That's the advantage of Lineage. We can be updated to 10 maybe before IdeaLTE does it. And even if we can't, security updates can be delivered. My Samsung TAB S from 2014 is on the Lineage version of Nougat, but it has the June 2020 security update. I'm not arguing if you prefer Linux, but just saying that Lineage can keep Android going far past Google's official support. So long as apps don't exceed the capability of the hardware, things can go on a long time.