The developer seats are read-only, so they rely on designer seats existing to actually create files to inspect for development (and I’d guess PMs are using figma because designers are using figma).
If designers still want Figma then the other people are along for the ride (unless the idea is the designers are being replaced with a PM+Claude.)
As a PM in a startup, it took me a while to convince my boss I’m not a designer. It’s so easy nowadays to get a Figma file with an established design system and produce new features.
There are Figma plugins that let you extract a static HTML website into a Figma file. Copying that over Figma Make and prompting for a while can make pretty good prototypes that need very little adjustment back in Figma.
However, I believe that being able to do something doesn’t mean you should do it. Prompting back and forth can easily introduce a lot of cognitive load on top of all sorts of other daily task.
I feel the modern human in the loop is similar to the factory processing line workflow where just almost anyone can learn how to use a tool and produce output.