On the one hand, you can't deny the wins that comes from bullshit-free operations - no installing, no permissions, no need to deal with sysadmins to approve a new program[0], and updates do themselves. Files are backed up and trivially shared across devices.

On the other hand, you're now locked in to a vendor system, with vendor software doing file management, version control and sharing. You need constant access to Internet to do anything at all.

Then there's also issue of performance. I actually registered for a free personal account and started playing with this software. I saw more-less what I expected: it kinda works, like most such web tools kinda work - good enough to do something, but laggy and slow enough to piss me off if I were to spend more than 10 minutes designing anything in it.

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I can understand all the cloud nonsense (though I prefer regular files, thank you very much). But from the quick experience, the application would feel much better if it was a desktop/mobile native program, not a webapp. It's like with Google Office suite - looks cool to have it in a browser and it sorta can help with the basic things, but try to build a reasonably-sized document, spreadsheet or slideshow, and the performance drop will make you tear your hair out.

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[0] - How security is done on work machines is ridiculous, though it's a separate topic. I'll just leave this: https://xkcd.com/1200/.