iCloud sometimes silently fails to download files. Dropbox have, on multiple occasions, resurrected years-deleted files, Drive is a dumpster fire - it doesn't e

iCloud sometimes silently fails to download files. Dropbox have, on multiple occasions, resurrected years-deleted files, Drive is a dumpster fire - it doesn't even support exclusions, so will happily (try to) sync multi-gigabyte PST files, causing drastic CPU, drive and network IO saturation and Outlook faults. But hey, at least people consent to this trouble.