Joplin with a WebDAV server (for me it’s Infomaniak’s kDrive) provides syncing across multiple devices and is pretty much transparent. You should just force synchronize when leaving one of the apps to be sure (kind of like the save button in most programs).
In my mind, Veilid (https://veilid.com/) is trying to solve this exact problem.
It’s only been public since the last DefCon, so it’s a little raw at the moment. That said, it is also only a framework - specific applications need to be built.
See also their Discord: https://discord.com/channels/1077244355439509565/ and GitLab: https://gitlab.com/veilid/
There’s this back story about the “LoongArch instruction system, a RISC ISA that blends ideas from MIPS and RISC-V”. The article says it is MIPS-compatible and even runs the same Linux code [Loongson’s] old MIPS-based CPUs did. Why not just use RISC-V? MIPS is licensed from the USA. I guess they have a lot of legacy people at Loongson.