Stock ROM: Pie
Flashing from Stock to /e/ results in failure to boot (boots into fastboot and that’s it). Almost all users will end up there and then research “what the hell went wrong”. Needs an urgent update to Pie.
LineageOS for MicroG seems to be Pie already for polaris (since 16.0) so it should be relatively straight forward for /e/ to catch up: https://download.lineage.microg.org/polaris/