I tried to move from Dropbox to iCloud Drive however I have had multiple issues that Apple cannot seem to fix. Here is my story.
Six months ago, I purchased an iPhone X and my iCloud Drive would not sync. We tried a new iPhone 8 and nothing… same issue. I would create a folder on my MBP and it would sync to my iMac, iPad, even my iPod touch but never on my iPhone X. After 30 email to firstname.lastname@example.org (I know he never saw it) and getting a call from the “Executive office” and another 3 weeks it started to work. I asked them what they did. They said “it just started working”. I explained to them that if they do not identify the problem then there is no way to fix it.
Fast forward 6 months. I started to notice that iCloud Drive was creating up to 110 duplicates of the same file and consuming space of course. They had me delete the files from iCloud and re-sync. I did so, but now its been 3 days and I do not even have the folder structure on iCloud from my MBP. iCloud Drive is so unstable that I cannot continue to use it. Apple still does not have a clue what the problem is. The only options is to escalate to the “engineers” which just send an email saying “everything looks fine and it should be working” but it does not. Dropbox just works. I so wanted to move to iCloud Drive but their lack of understanding of the product and the lack of desire to truly fix it is sadly crystal clear.