I recently downloaded Microsoft Powerpoint on my Mac. I found out that when I edit my presentation it will actually autosave it to cloud, just like the web app. It was working well for a while. But today I closed my window somehow hours of my progress was gone. Turns out that I ran out of the "free 5gb of storage" and I ran out of storage without noticing it, so it did not save. I'm never going for cloud EVER again. We all make mistakes, and this one taught me a lesson not to use cloud storage. BACKUP BACKUP BACKUP GUYS
That sounds like an application issue, you can run out of space locally as well (especially with the Macs that are shockingly stingy with the storage in the basic configurations and cost tons to buy the devices with more, and the SSDs were soldered even when they were more like PCs than phones). Backups wouldn't help to recover some work that was never saved.
The point is you could run out of space anywhere, and if you're suggesting 50GBs is a lot and you'll never run out of space I think you're preaching to the totally wrong choir.