I had the exact opposite experience. I tried to sync about 700k files to Dropbox and it chewed up CPU for hours, never got past "Preparing to Sync" (or whatever is the equivalent), then crashed. I tried a number of things. Circa about 2 years ago.
Google drive does annoy me when it decides to do a "full scan" and won't sync anything new until it completes, BUT, it does sync all my data, and it doesn't crash or use tons of CPU.
I tried deleting a few thousand files from Google Drive and they just got stuck in the trash...had to manually select them all a screen at a time and delete them from the trash, since "empty trash" didn't work. I also ended up with several thousand "unorganized" files at one time--files that are visible to search but not shown in any folder.
I had the exact opposite experience. I tried to sync about 700k files to Dropbox and it chewed up CPU for hours, never got past "Preparing to Sync" (or whatever is the equivalent), then crashed. I tried a number of things. Circa about 2 years ago.
Google drive does annoy me when it decides to do a "full scan" and won't sync anything new until it completes, BUT, it does sync all my data, and it doesn't crash or use tons of CPU.