Since the change - from Cyanogenmod to LineageOS - the amount of supported devices shrinked and nowadays I can't even find old LineageOS builds any more for devices they used to support, but not any more. I've lost faith in LineageOS.
It's a LineageOS fork which bundles MicroG and several apps to make a more usable out-of-the-box OS.
They have also re-added frequent builds for many of the phones that Lineage had dropped - including the OnePlus X which I have.
Infosec Handbook did a rundown when they first came about: https://infosec-handbook.eu/blog/e-foundation-first-look/
Then they did it again, more recently: https://infosec-handbook.eu/blog/e-foundation-second-look/
There's also this site: https://ewwlo.xyz/evil.html
As far as companies go... Will Microsoft sell you a copy of one of their old unsupported OSs? Of course not.
I think this is a step in the right direction.
As for old builds being removed, this is completely asinine. and their rationale really doesn't hold any water. You can likely find an archived version for your device, or continue building from source, 14.1 still gets Android Security Bulletin patches, for the time being.
0. https://github.com/LineageOS/charter/blob/master/device-supp...