The most complete launcher with a ton of extensions probably is Ulauncher on desktop linux. I prefer to use Albert launcher for the time being, because the filesearch plugin uses its own index. On Ulauncher it’s too slow. It might change with the upcoming ulauncher v6 (in beta right now).
In any case Ulauncher has many many extensions. It doesn’t have a reddit extension but it has a “save to notion” and AI extensions in stable V5 branch right now.
Just be careful if you test several android roms, the phone uses anti rollback (ARB), like pixel phones. In certain circumstances it’s possible to brick the phone, and you’ll have to send it to fairphone.
With android roms that allow relocking the fairphone bootloader (Calyx and Divest for instance), really check if the bootloader can be relocked via fastboot command-line, it will brick if it’s not the case.
I spent some time reading before attempting anything on it and it went rather smoothly, I don’t hop a lot between roms though.
Maybe most people using Mailbox know about this but I’ll still mention that using Mailbox kinda requires having your own domain.
Reason is the same as Posteo (unless Posteo changed something lately) : mail adresses will get recycled after some time when you stop using the service and close your account.
Most other providers blacklist adresses so they can’t get reused when an account gets deleted.