In the case where supply catches up with demand after a few months, what percentage of people decide to pick a different brand versus a different model or just waiting?
I can imagine first time buyers, with a deadline for a vacation/wedding/birth, not wanting to wait for backorders. But without a deadline, how much delay would cause a large portion to decide on a different brand? I don't mean that as a rhetorical question, I genuinely wonder where that tipping point is.
Personally, I do a lot of research into the available options, hunt down neighbours/friends/family with similar needs and check on forums to see how long $brand has been dooooooooomed already. For most things, there's such a clear winner that waiting a few months isn't an issue for me. For deadlines like a vacation, I haven't had a something required go on backorder in a long time, so my R7 preorder landing on a batch a few months after the original batch wasn't an issue. However, it was annoying that it arrived at the store while I was on my way to my vacation destination. So my direct need was gone and I decided not to buy anything

The worst thing was realizing, in hindsight, that the camera had been at the store when I drove past it on the way to the ferry!
Let's see how the R8 timing works out this year. And I'll give the store a call before driving past it again