I have the dropbox app installed on my 2019 MacBook Pro and for weeks now I've noticed CPU usage above 100% on my machine, which often causes the fans to spin up to insane levels (thank you intel Macs for being thermally garbage) at all hours of the day, often in the middle of the night after being asleep for hours. More recently I've had my Mac drain power to zero while plugged into power. This happened once while the computer was fully asleep and then again today while under normal browser usage. Activity monitor showed intense CPU and Energy usage by Dropbox in both these cases.
I've tried reducing the number of files in my local dropbox significantly with Selective Sync to no avail. There are no sync issues. Dropbox doesn't even appear to be syncing most of the time.
I have one external disk backing up to a business dropbox account and two dropbox accounts synced to my Mac. This app is becoming a huge drain on my computer and productivity.