I know some projects like Pi-hole and Kodi, but what super cool on Raspberry Pi 4 to install?
Relevant post 'What can I do with a Raspberry Pi 3' :
Edit of the 6 June :
The same post by @madza "What's your use of Raspberry Pi?" for more responses if you want 😎
Tips: If you want to obtain a Raspberry Pi, check this website to see the stock across some websites, and their prices. ✨🚀