What about the lenses though?
Sony has access to incredibly unique lenses like this one which cannot exist on DSLR mount.
https://dustinabbott.net/tag/tamron-70-180mm-review/800 grams for an F2,8 zoom that reaches 180mm.
Image quality is uncompromised.
AF is silent.
Speed of AF is almost instant.
The Sony systems get all of the most advanced technologies into their lenses and cameras right now, and it really shows in their popularity.