I'm definitely interested in this new mirrorless.Not immediately but
when funds allow. The change in mount isn't an issue to me as if they are going to also go with a sensor larger than FF the increase in size is necessary.
I do however suspect that Nikon may be the Nvidia of the camera world. Their actions do sometimes appear to be anticonsumer. That said I've owned Nikons for 35 years and I like their build quality and ergonomics and even the old gear is capable of better results than I can produce.
As for GAR I see it all the time, most gear spends more time in a cupboard than being used and most users never seem to get the most out of all the money they spent, myself included!
My new plan is a couple of bodies a small selection of lenses and really learn how to take good pictures. Far more rewarding I think than buying new stuff