Grew to 5 days, 20:35:23.923087 .
Linux needs restarts often – this fact implies that methodology cannot be so strict. But the new maximum is determined now. Linux bugs need esp. to be addressed when there is so much bad-bugs in LXQt Panel, i saw something bad even in glibc — strange error about QGis popular geo-mapping application specifically.
You don't know when glibc or some other, BASIC-SYSTEM related, bug arose under Linux.
Interesting „phenomenons” was also with installing tmux in systemd, understood as service controller. Multiple combinations of .service file contents, and... why?? VT is so strange, even when no after-boot (to be understood: in the framebuffer stage - but after initcpio) console problems.
GRUB configuration with a background image cannot be done manually – but it WAS easier than executing image showing in next phase(s). Fbsplash actually was OK only with MANUAL invocation – it is a service - or - not?? Why so much calls in the initcpio scripts??