I don't claim to see the future but I doubt it because I don't think they're economically viable. 

When I say ordinals are buyers of last resort, I really just mean that in the current environment. I definitely don't think they will always be the ones pushing up fees. The way I see it, regardless of the "how", the important part is the "what". What's happening are high fees. And high fees are proving (or battle hardening if you will) the network.

Probably could have worded it better and just called it mempool fillers of last resort, not fee payers of last resort.

If not ordinals, something else will come along. Whether that is institutional level money transfers on the base layer or something else.