I use syncthing to sync my dev folders between windows, linux and mac. The mac is set up to backup to time machine and backblaze. I’ve standardized on vscode as much as possible, use settings sync to automatically sync its config between machines, and put per-project config in the project’s folders.

If I had to start over now I would consider something like github codespaces, but requiring constant internet connectivity would be enough of a downside I would land on syncthing + vscode again.