Sony is a large conglomerate, of the world stopped buying ILCs tomorrow they’d be fine. I’m not sure if it’s still true, but in the recent past most of the revenue came from their financial services division, not from selling electronics. However, they do have a history of cutting or cutting back unprofitable product lines (Vaio computers, mobile phones which are now sold only in Europe and a few Asian countries). Cameras are in a different business unit than sensors.

I do think that smart phones are eroding the DSLR market, and are also responsible for the flat sales of MILCs. Consider that an iPhone 13 Pro is like having an MILC in your pocket with 13mm, 26mm and 77mm lenses (except they’re not really interchangeable lenses, so yay for Sony who gets to sell Apple three image sensors per iPhone).