Announcement by the creator: https://forum.syncthing.net/t/discontinuing-syncthing-android/23002
Unfortunately I don’t have good news on the state of the android app: I am retiring it. The last release on Github and F-Droid will happen with the December 2024 Syncthing version.
Reason is a combination of Google making Play publishing something between hard and impossible and no active maintenance. The app saw no significant development for a long time and without Play releases I do no longer see enough benefit and/or have enough motivation to keep up the ongoing maintenance an app requires even without doing much, if any, changes.
Thanks a lot to everyone who ever contributed to this app!
Perhaps the hard dependency was a mistake, but not them moving more and more code to their proprietary library. It appears that their intent is to make the client mostly a wrapper around their proprietary library, so they can still claim to have an open source GPLv3 piece of software. What good is that client if you can only use it in conjunction with that proprietary library, even if you can build it without that dependency?
I’m not familiar with exactly what Bitwarden are doing, but Nvidia are doing something similar to what you described with their Linux GPU drivers. They launched new open-source drivers (not nouveau) for Turing (GTX 16 and RTX 20 series) and newer GPUs. What they’re actually doing is moving more and more functionality out of the drivers into the closed-source firmware, reducing the amount of code they need to open source. Maybe that’s okay? I’m not sure how I feel about it.
Instead of open core I’ll call this popular approach “open skin”.