This doesn’t sound like an issue for those who use Fusion frequently, however you may want to find ways to get local files, just to be safe.
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Having tried Fusion 360... It's interface and design paradigm is utter trash. NX, Creo, and Solidworks are all far ahead. Can't speak for catia, I've never used it but the versions I saw looked worse than Fusion
We all have our preferences, although some people's are clearly more insightful than others...
UX isn't universal. What intuitively clicks for one person might be unusable for someone else. Good UX is adequate for as many people as possible, but it can't be perfect for everyone at once when some people work best with large labelled buttons with big, clear icons that have to go into submenus to fit on the screen, and other people prefer lots of small buttons whose purpose and location they've memorised which all fit on screen at once to save them needing to click into submenus.