While I could imagine several manufacturers taking them up on this in Europe, I think it's mostly an empty gesture in North America given the connector incompatibility.
No other manufacturer is going to design their cars with Tesla-style receptacles, as that makes them wholly dependent on a third party network and eliminates compatibility with every other network out there that uses CCS. Similarly, I don't see many manufacturers going out of their way to sign on with Tesla and then make some clunky Tesla to CCS adapter available for sale. Charging complexity is a big psychological barrier to EV adoption and I don't think introducing a bunch of dongles is going to go over well from a typical consumer's perspective.
If Tesla was really interested in accelerating EV adoption in general, as they claim to be, they'd abandon their connector and adopt CCS, "unwieldy" or not.