He probably gets paid pretty big money as a product endorser. That said, if he wanted ST over 65, that was his choice of the aesthetics. Having watched about an hour of BR2049 a couple of nights ago, I noticed he rarely went for the super shallow DOF.
In terms of the 65m lenses, most are rehoused Hassy (most Panavision 65 glass is with them or in private hands).
And languages get displaced, if you don't use them on a regular basis.
It does seem like having the Signature Primes is probably what made the difference for him, more so than the sensor size. For Bladerunner I can see how he was more comfortable shooting on Master Primes, especially because there was going to be so much complexity to the lighting and CGI.