One the one hand, quality camera's should keep upgrading the periferal hardware to keep match with modern IT-supplies and on the other hand keep a focus on durable products. Why wouldn't producers do this? Cost savings and probably price competition.
The competition (smart phones) have a whole different market. They have a product that people (regretably?) replace every 2-3 years. The market dictates the newest techniques. Pictures are sensors + software. Software has a much shorter improvement cycle. Hence, I would expect a continuously larger part of the camera market to 'fall' for the smartphone camera. Heck, the 'official' advice from my preferred reviewers is not to buy a small camera anymore, but use the savings for a better smartphone.
And then you have large old-camera corporations struggling because their highest margin products (just a guess that that was the little cameras in the former days, not the professionaly product) are falling away. So they don't have the money to keep their high-end products up quality wise nor the institutional awareness to quickly adapt. Cycle a few times... Read OP.