I definitely agree that 11 years for cameras in general isn't that much - I personally use us 60+ year old lenses on my A7ii so I can certainly empathize. Most

I definitely agree that 11 years for cameras in general isn't that much - I personally use us 60+ year old lenses on my A7ii so I can certainly empathize. Mostly my point is that mirrorless cameras adopted PDAF as soon as making a useful pro-level mirrorless camera was possible. Also, I'd argue that mirrorless cameras are basically a digital version of rangefinder cameras - they make a lot of the same tradeoffs optically and indeed there is a continuous history from digital rangefinders to modern mirorrless cameras.