There's nothing wrong with LineageOS and I'm not criticizing their work. They do a great job keeping phones supported past the time when manufacturers have dropped support. But the Android community is far too willing to trust ROMs downloaded from forums that include who-knows-what and calling it "solid software support".
Solid software support is updates from the manufacturer, the company I originally trusted to provide updates when I bought the phone. If I have to rely on the work of people who once called themselves "Team Douche" [1] because the company who released the original software has stopped support, I'm not considering that "solid software support".
[1] https://www.talkandroid.com/16074-modders-round-table-with-t...