Rest easy, I am not dropping Linux support, if for no other reason than that I still personally use Linux, and it would feel wrong to me to not support the OS I use in calibre. But yes, I am utterly fed up of these types of issues, as I said I need a sabbatical to recharge and just write code
I have some nice deep programming problems in my queue in my other major project, kitty, so I think I will focus on that for a while.