This week I canceled Dropbox, and on my Windows PC, I moved ~500 GiB from my Dropbox folder over to the Google Drive File Stream volume.

I barely noticed any CPU usage from GDFS, and Dropbox.exe was also somewhat reasonable, but the fans of the MacBook Air next to me started screaming.

There is something wrong with their Mac client, and with GDFS, the old MBA remains quieter, and the battery life improved as well.