Yeah I know there are a few people who was new to both the X1000 and OS4 when they bought one, like AmigaDave, AmigaNG, clusteruk, darkon_turas, gerograph, Haranguer, ggw, klx300r, musa, otakui, sam, Tuxxl, VingtTrois, Zenzizenzizenzic. Probably a few more, right (feel free to add the others you know about)?
And then of course we have VOX, who (according to his friend djnick) paid €3600/$4850 (which equals to 10 months full time salary in Serbia (almost a full year's worth of payment(!))) for his X1000, and to manage the purchase he put himself in debt until 2018 (which is still kind of an aggressive payment plan for 10 months of full time salary IMHO, when you still have a life to live with all those day-to-day expenses like food and rent and the usual bills), and then he got banned from Hyperion's support for asking too many questions about the X1000 driver situation, he seems to be banned from all other sites as well, but on moobunny he talks about class action lawsuits now.
And even if you manage to double the list above, we are still counting in the range of tens of people. That's virtually nothing. And it still isn't a sign of platform growth at all, you would have to count those who left as well! And you don't have to do any counting at all to understand how HW this expensive (with that performance) can't create any real platform growth whatsoever, it's just a matter of common sense.
I think personally think Vox was crazy to get into such a debt to get an X1000. I don't think Vox was banned for simply asking questions but the manner in which he was making complaints. Whether it was right or wrong to ban him I will not be the judge of but regarding complaints, he was aware of the pace of OS4 development and like someone else said, he can't expect the pace to suddenly increase just because he spent a small fortune to get one.
Counting people who have a system is irrelevant since many people simply don't make it known.
As for growth I guess it is a case of wait and see what happens. There were people that were saying that X1000 wouldn't make it out of the door, that it only ship with Linux and Trevor would cut and run etc etc but by all account it has sold very well considering the seemingly small market and high price. Acube are still around too and the Sam460 is there third product aimed at OS4. All this is years after Bill Buck said that the Amiga PPC market was saturated.
I think there is still a lot to be positive about in the Amiga scene whether 68k or NG with plenty going on. It's just some people prefer to focus on the negative.