I am using Canon M39 screw mount, FL, FD, New FD, and EF lenses on my Sony A7RIII. They all work great. Some need CA(Chromatic Aberration) adjustments.
I am using Fotasy, Fotodiox, and K&F Concept adapters. These adapters are under $30. I have adapters for my Canon lenses and Nikon MF, Minolta MD, Olympus OM, Konica, and M42 screw mount.
Having Focus Peaking, EVF magnification, and IBIS(In-Body Stabilization) make mirror less cameras a great platform for vintage lenses.
If your lenses are in good shape then I think you will be pleased with the performance.