One thing that strikes me about the latest Sony lenses I've bought is that they're very good across the frame and may lack any significant weaknesses. They can have their own look, colour and rendering wise but other than that there's really nothing to look at. I wont say "criticise" although you can do that with older lenses and some newer ones but I think there is less obvious character to look at with pictures taken with good modern lenses.
With old lenses and even with modern Voigtlanders there are very often and particularly at wider apertures things which stand out and make it possible to identify what lens a picture was taken with. The way the sharpness falls off away from the central area, the performance towards the edges and into the corners, the bokeh, colour, contrast, flare and all the rest. With good modern lenses I'm not sure that's quite so easy or even if it's possible at all apart from at the widest apertures and with subjects and scenes which will show what character they have. With some pictures if I didn't know what lens I'd used I might get the focal length about right by looking at perspective and rendering but other than that I'd struggle and getting the focal length about right when looking at other peoples pictures is at best probably all I could manage, I probably wouldn't know what lens was used.
I suppose it depends what we want. If we want lenses which can be pretty transparent and anonymous then we're in luck but if we want to look at a picture and see more obvious fingerprints of the kit used then good modern lenses might not give us that.