Plasma 5.25
Plasma is the best modern desktop environment for Linux and yet people barely talk about it.It is complete, mature and works out-of-the-box.For users it has sane defaults but provides virtually endless customization and contrary to other desktop environments, user customization is encourage.For developers, it provides solid libraries to build upon, not like other libraries that are constantly changing and making developers' life harder.And yet, people don't care about it.