I sold my 85 1.2L for the 85 1.4 Art finally for the same price.
I think it was about 12yo
There was no distance communication between the 85L and my body as it was still the MKI (intresting to have seen that I have a Godox TTL strobe)
The Sigma hit-rate is a lot higher and out of tests there isn't much difference in bokeh /dof between f1.2 - f1.4, the glass is made for higher resolution, so it's definitely an upgrade.
I started without docking station, i'll see next week if the AF is spot on, or needs to be adjusted between -9 and +9 like some say.