[voltagex_]

You hit the 5X jackpot - up to a certain manufacturing date, those phones were notorious for bootlooping and never working again.

More on topic, the LineageOS support requires a volunteer maintaining a buildable tree for the phone, and testing will require the hardware itself. I'm not sure how much CI/CD helps here.

[bscphil]

You're right: of the four 5X phones owned by close friends or family, only 1 bootlooped (and one was stolen). It would be great to have continued support for the remaining phones, but planned obsolescence is too strong.

The Nexus 5X supposedly has a maintainer with LineageOS, but maybe they're busy or no longer own the phone.