Slackware / Slarm looked to be a lightweight good option for the Pinephone. I downloaded and flashed on my 32GB new microSD card the folowing:
slarm64-current-aarch64-xfce-pinephone-6.2.3-build-20230311.img.zstit doesn't boot at all... I followed the instructions at http://dl.fail.pp.ua/slackware/images/pinephone/No idea what's wrong...