The lack of vision at DSLR companies is mind boggling. Why can't I do light editing and post to Instagram directly from the camera? Why can't download the photos directly to a phone? Why can't I charge from a micro-USB/USB-C cable? I get it that pros don't need these features, but how hard are they to implement? The camera is already $1000+ dollars, how much more could adding a touch screen, a SIM card and a beefier…
It's a huge investment in software and hardware for an almost non-existent user base. Most current DSLRs already have Wifi or a Wifi option; those that don't can be fitted with a Wifi SD card. It turns out that hardly anyone actually uses that feature, because Wifi transfer rates are generally a more problematic bottleneck than the inconvenience of pulling the SD card and putting it into a card reader. The main users…
A very large number of would-be content creators (not just Instagram, either - YouTubers also) want the higher image quality, dynamic range, optical zoom, interchangeable lenses, etc. of a full-body camera, but don't want to deal with the clunky interfaces and multi-step processes just to get your images/videos to a format, style, and place you want them. Yes, that's a subset of the market, but it's probably a bigger potential userbase than traditional "pure" photographers.