Don’t believe the hype, onshape is like a Cad software on Citrix. It’s not spreading the cost of computing a complex fillet over hundreds of machines (or even better, running the same operation in the browser and the cloud and letting the fastest one win). They spin one EC2 for you.
So you really don’t get any benefit from the cloud.
the cloud benefit is in the version control, branching, merging, multiplayer, never having to send files, always working in the same version as everyone else. It's in everything communication, not in quickly calculating a fillet.
I also got very sad when I learned it was bought by PTC.