re: 6: eh, it's less than that, as long as you're in the same architecture. Linux applications virtualized on M1, running on a Pi 4, and Graviton2 are going to

re: 6: eh, it's less than that, as long as you're in the same architecture. Linux applications virtualized on M1, running on a Pi 4, and Graviton2 are going to be binary-compatible with each other, and although you'll get the extra atomic performance out of the M1, they won't be massively different other than just scaling up. Cross compiling after some testing to ensure the right atomic order was used should be fine cross-arch. If one were to add more ARM extensions and actually push them for third-party usage, that might change though.