[hanafudafan]

I'll just install the update myself.

[theptip]

As the article notes, not all models have that option. 2017-or-later is the cutoff now I believe.

Sure, take the upgrade if you can though.

[hanafudafan]

Who can stop me from compiling and installing some software though?

[saghm]

Installing the newer versions won't make the old ones go away though, and there are presumably a lot of built-in things linking to the old versions.

[theptip]

Sure, you can side-load it. Stuff might break since the OS makes assumptions about the hardware.