User for over a year, having tried many operating systems (Windows 10/11, Raspbian, PiHole, Android, Balena Sound...), I am literally impressed. It has withstood everything. One major drawback is its temperature, where you don't need to worry, as it throttles when it exceeds 80-85 and 90. I have used it during the summer months and everything is fine, but the performance drops and even minimizes. I would simply recommend an ice tower. However, regardless of its use, I would suggest buying it..

We didn't expect anything less from the new Raspberry Pi, that's for sure. It's excellent both as a home server and as a server in general. I even used it for local testing for a while and it performed exceptionally well. The little fan does make a small and annoying noise after a while, but that only applies to heavy usage, so under normal conditions it won't be bothersome.

I am running HOME ASSISTANT OS with samba & ftp installed. I have been using it as a server for HA for a year now and it has never crashed

Raspberry PI 4 B 4GB. Use as a media station and Home Assistant function.
For the money, it is an excellent purchase as it is a light Linux environment that you can even build as a PC if you want.
Overall
+ Interesting for DIY
+ You can build a PC economically
+ Small size
- It heats up
- To bring it where you want, you will need at least the following additional purchases such as a fan/case, power/mini HDMI cables, wireless mouse/keyboard, possibly various modules depending on the use, a reliable SSD/cable, a screen if you don't connect it to an existing monitor/laptop/mobile.
- The Raspberry PI community is not mature

Compared to the previous model, it is much improved, perfect for web servers, emulators, or any other type of project.

Of course, if you want it exclusively for web/minecraft servers, it is better to get the 8GB version.

If you are interested in low temperatures with or without overclocking, you should get the ice cooler heatsink. It is perfect for keeping the Pi at low temperatures.

https://www.skroutz.gr/s/27402004/Low-Profile-ICE-Tower-Raspberry-Pi-4-Cooler.html?from=catspan

Upgraded significantly compared to the Series 3, I got the 4GB version. You can watch YouTube with minimal frame drops, with Twister OS you can play some old x86 Windows games (Lutris + Wine), and Retropie also plays some PSP games. Beyond that, it is a stable system that can stay on day and night and run applications, like Pi-hole to block ads on other devices such as smartphones and smart TVs. In terms of temperature, if you push it with games and have it in a case, it overheats and gives warnings. What I do is leave the case without the cover.

I have the 2gb model for retropie and it works perfectly, but with Linux it still freezes even on the light versions. Now with this specific one, I run ubuntu-mate with minimal freezing (which goes away if you overclock the processor) and I have a regular PC for simple web browsing and Netflix. If you also install android TV, you have a powerful TV Box. It has many capabilities for projects and developers, as for most, 4gb is more than enough, without needing to go for 8gb. However, it is recommended to install heatsinks and a good case with a fan for slightly better cooling.

This particular machine is very good and worth its money. To make sure it doesn't overheat, you also need the following case: https://www.skroutz.gr/s/20457476/Raspberry-Pi-4-Aluminum-Metal-Case-with-Fan.html?from=account_favorites. Otherwise, it is very fast and reliable. I upgraded from a Pi 2 to this, so the performance is day and night.

If you manage to overcome the very common problems with HDMI that many screens do not recognize or sound issues that many Linux distributions have with continuous changes in boot settings, maybe you can finally enter the operating environment, then yes it is worth it about 70% as a desktop computer or as a server. I gave up on them.

Very good product, it literally does everything. It's not for beginners. Very good value for money. Very satisfied. I use it for internet tasks and remote control, and as a NAS server FTP. It's worth trying and experimenting with. Put a cooler on it and you're good to go. I have it on all day long

You know the features. Regarding the temperature, however, a new firmware has been released in Raspbian that lowers the temperature by several degrees (about 8). The commands are "sudo apt-get install rpi-eeprom" and "sudo rpi-eeprom-update". I also have the Flirc case and it doesn't exceed 52 degrees with sysbench (at room temperature). The ExplainingComputers channel on YouTube has a lot of information and benchmarks. I use it as a server, where it does its job perfectly. In Raspbian, which I tried, YouTube is still not fully supported by Chromium, this time due to some software issue. This will likely change in the future as the Raspberry Pi Foundation works on the software.

It is for people who know what they will do with it, it has an issue with temperature in its case so it definitely needs the fan! Very good signal on WIFI! BT, fast without any problem! It will have a "problem" if proper cooling is not done! I have it as a mini server and ADs remover on the whole network.