That's usually sound advice. However, the D850 has some features lacking in my D800e and for which I have a pressing need. Among these are decent live view, electronic first curtain shutter, silent mode, and hopefully use of EFCS without the need to be in mirror lockup mode. Accordingly, I did not wait. However, this runs the risk of dealing with some teething issues on the first iteration of a new model.
Hi Bill,
Yes, I agree that pressing needs may require to dive in early. That happened with me when the first FF cameras with Live View and AF manual adjustment were released (and my prior camera body required lens adjustments for AF that might conflict with the new body). But when ever I can wait a bit, I get monetarily rewarded, which also feels good.
And even in the case I just described, my usual dealer didn't want to match the (€ 200 lower) price of his large competitor, so I switched dealers. A week later they did lower their prices to the same level, but by then they lost a customer, me (and I also purchased a new WA-zoom lens together with the body, because I saved enough on the body purchase to justify the bundle).
Cheers,
Bart