In your dreams 
FWIW, Cloud problems are not confined to Apple-iCloud. Even the famed Dropbox has its issues. There is, of course the infamous intrusive, bloated and resource-hungry Dropbox macOS app. And Dropbox also can be slow when syncing, as explained by @tjluoma in this post:
https://talk.macpowerusers.com/t/replace-dropbox-app-with-maestral/25701/4?u=arthur
excerpt:
Dropbox apparently overcomes slow or erratic sync by brute force (the aforementioned intrusive macOS app). Apple’s iCloud sync simply putters along, oblivious to users but eventually completing its tasks. Most of the time.
I have learned … the slow and painful way … to bypass certain weaknesses of iCloud and Dropbox. Two examples:
- Avoid disturbing your iCloud connection or sign-in at all costs, for fear of having to re-sync the iCloud Photos Library on a device that stores full-resolution photos.
- Replace the Dropbox macOS app with Maestral (see the MPU Forum thread referenced above).