EVFs in part an issue but they are getting better. Size - I do prefer a larger camera - but the Nikon Z9, GFX100s, Panasonic S1R's etc are all right sized for me.
My major worry is sensor dirt ingress. Every workshop client has mentioned it who's had Sonys, Z7's, R5's etc being much more of an issue over their older DSLR.
I'm sure the AF is better distributed on the mirrorless - but you can have the issue with PDAF banding/striping.
I'm in no hurry to move over.
The article mentions lenses that are being discontinued. Perhaps what is interesting is what's being continued. In the Nikon list the discontinued lenses (bar the 18-35 ED and 70-200 F4) are all pretty old and have been superseded with newer versions. With these two - there are more high end lenses with similar FLs. So it appears bad, but actually I can see a different story. The F1.4 primes, current 2.8 trinitys, the super tele zoom and prime pro grade stuff is going nowhere. Some of the current hobbyist crap is getting ditched - and that's more to do with the rise of camera phones than anything else.