People has been asking why tex writer no longer syncs automatically. I think we better answer here so that we can hear more voices.
The reason we didn't turn on auto sync by default is that it gives you a chance to review local changes like a light weight version system. You can even revert unwanted changes. The new syncing model encourages people to collaborate on a shared folder. Therefore we don't want to overwrite the remote copy too easily. It would be quite annoying if you sync breaking changes to cloud.
An exception is, for remote compiling (xelatex), we have to automatic sync the working changes to cloud so that our online compiler can fetch them.
We can provide an automatic sync option in future if people find it necessary.