Google drive and Dropbox don’t really have the same functionality. Google really wants you to use a web browser; in my experience the filesystem integration has always been flaky. Whereas Dropbox directories that appear in the local filesystem are really solid.
On the Mac OS that functionality has always been flakey, through several rewrites, not just bug fixes. About half the time it’s not syncing (often due to crashing, but sometimes just mysteriously) on my completely vanilla macos laptop. Dropbox “just works”.
