Settle. Not necessarily slow down. We'll see people gravitate towards a few things, and those will become the standards. It's already started, with claude and codex, compared to the wild west situation a year ago.
The closest parallel I can think of is javascript frameworks. The 2010s had a new framework out every week. Lots of people (somewhat including myself) wasted a ton of time trying to keep up with the churn, imagining that constantly being on the bleeding edge was somehow important. The smart ones just picked something reasonably mature and stuck with it. Eventually things coalesced around React. All that time trying to keep up with the churn added essentially no value.
What makes you think they won’t? And even if they won’t, not wasting energy going through the churn is a winning strategy if eventually AI reads your mind to know what you want to do.