Originally posted by reh321 I showed up when Nikon's "road show" to introduce the original versions came through town. I was suitably impressed, including with Nikon's converter to allow use of existing F-mount lenses.
Apparently they have not sold as well as expected, which surprised me - the Z6 would have been high on my list if I had been a Nikon, instead of a Pentax, user.
Their FTZ is markedly inferior to Canon's hassle-free EF-RF... if only because Nikon maintained screwdrive lenses in their portfolio for much longer, à la Pentax. So a host of older Nikon F glass doesn't autofocus on the Z cameras. That's strike one. Strike two was, from what I read, the lack of "interesting" glass - Nikon already had great DSLR pro-grade and mid-tier lenses... so they repeated them in Z mount. Canon said "we already have f/1.4 glass and consumer-grade stuff so the monsters come first", which certainly piqued the interest of people even if they didn't
sell a whole lot of them.
The Z6 and Z7 were ridiculously expensive at launch - with both being strictly inferior in performance to their DSLR equivalents (D750 and D850, respectively), there wasn't a whole lot of incentive to spend 4-5000€ in new gear just to do what you were doing before. Canon also didn't sell very many cameras until they dropped the RP as a honeypot for the people who were interested in trying the system*, but Nikon took almost two years to release the Z5 after someone decided, somehow, that the Z50 was a good idea.
I'm only comparing to Canon because it's the other DSLR-to-MILC player; Sony more or less started from scratch and so did the L-mount guys, so not quite comparable I'd say.
*And even then it looks like *the* cameras were the R5 and R6, which are spec monsters and seem to be very well received, overheating notwithstanding.