Technically other companies do, and I lump them in when I say "these AI companies" I am talking about any company that makes and builds any AI harness, coding or otherwise, I have not seen any innovating in the areas of the UI / UX of using these chat models in a meaningful way.
That was the objection to Microsoft controlling both the dominant OS and the most popular productivity applications running on that OS. Took the web then mobile devices to really shake that up.
Well, like 30 years ago, a French comedy show had foreseen it, the "World Company" buying everything, no need to understand French to understand the "joke" at the end https://www.dailymotion.com/video/x4du7uh