Earlier quoted context omitted.
This is the first time I've heard of this change to Fusion360, and my initial reaction was to lower my opinion of Autodesk. But on second thought it seems like a good compromise: hobby users still get the functionality for free, but it dissuades use of the free version in commercial manufacturing.
I see no excuse for artificially sabotaging output. Limited access to features is one thing, artificially injected breakage is another. A person or company that behaves that way is not someone I want to deal with and not a tactic I want to reward with success. I would rather pay even more to have open source developers work on honest problems.
Seems like “how quickly they need the job run” is a good compromise. For commercial use time is money, for a hobbyist something taking a bit longer is pretty inconsequential.
The alternative you’d suggest is just to cut the hobbyists off. How is that better?