As someone on Linux (popOS), I also gladly welcome it, as even the best file explorer I know (nemo) could use niceties that you find on Windows or macOS.
I'm highly skeptical of the economics of it though. The only way I would see it working out, if their planned "sync" product would be able to overcome the entrenchment of iCloud/OneDrive/Dropbox, which seems like a tall order. As a user I'd pay ~$50/year, but that would take a lot of customers to sustain even the current team size.