This was a great episode, I hope it receives the attention it deserves. I'll just draw out one part that struck me from the transcript at your link:

Matt Now, you know, that needs to be on the roadmap in the very short term because we're in such a bad place right now. And I you know, I think the Bitcoin community needs to start thinking about what the long term plan is here if miners don't start taking these options.

Marty Yeah. What hash function would you would you prefer to use?

Matt Honestly, just leave SHA256, but use a 64-bit timestamp. Let's just fix the timestamp issue. Keep SHA256. Who cares? And well yeah, we'll just brick all the miners and replace them with new ones.

The next questions sensibly included the concern that it could lead to another monopoly/dominance issue, given the timing and the announcement of a new 'mining system'. At any rate, a cartel forming doesn't look as likely as some healthy competition.