Personally, I'm very pleased that my camera (a Nikon D850) boots instantly (approx 0.2 seconds) and has a shutter lag of 0.05 seconds (when pre-focused). It essentially never unexpectedly hangs when I need to take a shot. For my preferred subjects (wildlife) a consistently instant response is far more important than arbitrary functionality. If I want to share pictures or do other things, I can use the built-in wi-fi or Bluetooth to shunt pictures to my SmartPhone.
Why would I ever want any of that in a DSLR?
A DSLR can go from sitting on the shelf to having taken a focused photo in less than a second. The battery life is measured in weeks (unless using built-in flash). No comparison how much better experience it is.
My Sony runs Android and never hangs nor has an shutter lag. Instant response in everything. It can be done.
Granted, it's not "no shutter lag", but 2.3ms might as well not exist.
I looked at the camera specs online.
Also, what you're asking for is already available in most flagship smartphone these days. Instead of moving apps to cameras, they moved a good enough camera to a phone where all your apps are available.
The idea I really liked was Sony that made "smart lenses" that was basically a decent sensor and a decent lens that you clipped onto your phone and connected via Bluetooth/WiFi and used the phone as a display and storage