I think the explanation for this comes down to same dynamic involved in Microsoft eating the office application world in the 90s; People who buy the application

I think the explanation for this comes down to same dynamic involved in Microsoft eating the office application world in the 90s; People who buy the application for X feature will still buy it or stay with it with X feature now crappier while people want Y feature, even if it's crappy will now also the app - especially if the app is a market leader. In software development, there's an internal to the company dynamic where the designer/lead-architect/etc wants to show value to the company and so rework the architecture into the current thing or some idiocy of their own devising and this is how features worsen. You can call this a extra process but I think of this as just the way economic dynamic happens. If this dynamic didn't still make the company, it would be stopped.