[Matt3o12_]

This is not necessarily true. Apple sells their non Intel macs with Thunderbolt and there are some ryzen motherboards with thunderbolt support [1]. That being said, Thunderbolt is a lot less common on AMD boards probably because it is a lot more expensive then it would be on an Intel board. And Laptops so far have always received the budget treatment for ryzen chips (want a better screen? intel only, etc).

So I think lack of thunderbolt comes down to manufacturers not wanting to pay as much for their AMD R&D and keep costs down with simple, budget motherboards.

Or, if you needed Thunderbolt 3, you could just wait until USB 4 is commonplace, which is basically Thunderbolt 3 + some more.

[1]: https://www.asrock.com/mb/AMD/X570%20Phantom%20Gaming-ITXTB3... (there are more, and even ATX boards, first one I could find).