just by way of a more complete explanation .....
current cost of mobile internet to me at my level of use is A$3.75/Gb, with special offers $1.67 for next 8 months.
1966 when I first sat in front of a drawing board with first and third angle projections.
about 1982 when I wrote the capital request for the first version of Autocad, about A$15,000 plus hardware, to support a draftsman. The training courses I hid in the operating budget. It wasn't my money, but even back then I questioned the monopolistic business model with proprietary file formats. I lied in the justification, the draftsman took about two years to become comfortable. Productivity didn't improve. For me the challenge was in creating the mental picture of the requirement but the limits of human communication aren't typically discussed in this context.
Its been interesting watching the development. Reading engineering and electrical drawing all my working life and less so in retirement.
I realise Fusion will store files locally and synchronise to cloud later, I spend long periods away from internet. Its that the rules will (not may) change, that's bait and switch.
Structurally, a 3D drawing is just like any other collection of nodes and links, a network to me a graph to americans, with parameters for both, plus functions to manage the parameters, and an accessible interface to manage the parameters then a data exchange format for the next step in the chain.
I'm looking forward to low cost satellite internet, lots of low orbit satellites from perhaps the Airbus provided satellites, probably others. But not yet.
I'll continue to resist having accounts with all and sundry and being stalked across the internet - yes, I know its called tracking and its in my interests, but I don't need a relationship with my software providers, I need an arms length sales transaction not a set of marketing handcuffs and a one-sided agreement.