The opposite of these terms are also null and void, because then Autodesk would not be able to impose any new government-mandated sanctions or other mandatory misfeatures.
You sure? For a cloud-hosted app like Fusion/360 I would expect that you're only entitled to 3 years of access to PRODUCT_NAME/CURRENT_BUILD, without an option to rollback to older versions (eg. at time of purchase) on request, and almost certainly without reference to specific functionality. Unless they specifically inform you that older release are available, your contract with them absolutely would allow for removal of features.
58.9 million bought it with the expectation that although the license was perpetual they would enjoy the content over a few months and discard it for the next game.
It's meaningful to discuss what portion of the value was lost in the revision. For almost all users the answer is zero it's just something in their virtual library they will never install again.
Arguably a user who had lost a substantial portion of his expected use might be owed a refund while someone who last played it 7 years ago is not but the matter is too meager to be worthwhile.
Unless its an explicit mention of the exact feature in the contract (usually things like a fixed % annual price increase), its considered a change in terms of the contract that you can choose to continue with the changed terms or exit.
definition of product applies to current billing period only, Autodesk reserves the right to add or remove functionality without notice