A good start would be implementing flicker-free boot on Linux. Windows and macOS had it for a long time. On Linux, it takes 5-6 mode changes before the system a

A good start would be implementing flicker-free boot on Linux. Windows and macOS had it for a long time. On Linux, it takes 5-6 mode changes before the system actually boots. It doesn't make a good impression on users, especially ones unfamiliar with Linux to see the system constantly go dark, make some noises and switch from text mode to graphics mode constantly. Same thing for shut down, most Linuxes when shutting down flash text mode for a bit with lots of messages like "trying to kill xxx unsuccessful". To an average user that screams "this software is unfinished and can break any moment", which doesn't inspire confidence. I think the best chance for unification was Ubuntu and Unity. I use Unity on Ubuntu 18.10 because I don't like the GNOME interface (and it's much slower on my low-end laptop too). Unfortunately, the community seems to enjoy reinventing things. Implementing new stuff is exciting, fixing bugs isn't :(