I was so fed up of Google’s lack of real support for its tasks system, that I packed it up and went for the todo.txt system. Its simple, works well and found it works for most of my systems (Android, Linux, etc)
However in recent times I found the syncing between systems painful. At one point it was so out of sync I got so fed up and recently moved to todolist. Seems I’m not the only one… The clients sleek, todo.txt android, markor and even a plugin for Joplin; were doing strange things on top of Google Drive (I did try Dropbox too, but sync on Android needs a kick up to make it sync). Even considered using Syncthing but using Android when less things eating batteries as better, decided against it.
After looking at my options it was todolist, which at least has a reasonable free option. I also consider installing a CalDav server on the NAS or Yunohost behind my VPN. But decided I really don’t need the headache.
Of course I left myself outs, with some of the clients including Planner, which supports CalDav. Todo.txt has potential. Something to look into again in a few months maybe.