I work on React Aria. Adobe is a big company and there are many teams using different technologies. In general, some very new parts of creative cloud chose to use web components, but the majority of teams are using React, and I don't foresee that changing anytime soon. It's definitely not a company wide shift if you got that impression from the Photoshop article. Ideally we'd collaborate more, but... big company silos.
I can see the appeal of web components when your interop issues are as large Adobe’s must be. On the other hand if huge portions of your apps are canvas / wasm then web components’ DOM-centric component model might feel awkward or constraining
