2/ Regarding the #Linux 4.19.y EOL, see also this nice and interesting series farewell note from @gregkh:
https://lore.kernel.org/all/2024120520-mashing-facing-6776@gregkh/
'"[#LinuxKernel 4.19] had a good life, despite being born out of internal strife. […]
As a "fun" proof that this one is finished […] , I looked at the "unfixed" CVEs from this #kernel release. Currently it is a list 983 CVEs long, too long to list here. […]"'