Not necessarily. In my case, I don't spend days using a product. If problems don't crop up during the few hours I spend testing a product, I can't report them.
Oh, OK, right. From what I can tell, it's been reported for months very sporadically. This last firmware update (v1.10.1.2; released about two weeks ago), though, has neutered the 5GHz backhaul for those affected. Shucks, I think I jumped on the bandwagon at a bad time.
For those affected: if your devices are close enough to the router, you won't notice problems. But any wired satellite clients or WiFi devices too far from the router: it's spotty at best.
Here, I isolated the only 5GHz highband network in our house with a MAC address that just about matches the Orbi MAC address. This is a 1 minute spread of only the 5GHz backhaul. The drops existed through a firmware reset, new backhaul password, switched router & satellite positions, much shorter distance, etc.. In the end, it totally died: the satellite stopped syncing. I called Netgear and...shockingly...he said that even on L2 support, they had no idea how to diagnose backhaul issues (he was knowledgeable enough about its existence, though).
From the reports: most common on this latest firmware (but some reports date back to November 2016), replacements change nothing, and even disconnecting the modem does nothing: still the 5GHz backhaul craps out on affected users.
With not everyone reporting it, I hope it's just a nasty corner case. I've returned the Orbi just in case the resolution takes a while (Best Buy only has a 15-day return period, sadly). There's a beta FW being tested, but it's only been fixed for some users. Maybe a number of overlapping bugs in the 5GHz backhaul.
It's getting understandably tense over at Netgear's forums (and all these posts are just from this last week). I'm hoping they fix it soon so I can buy it again, but I don't want to risk it too early. Good vibes; sorry for the long post; thought I'd drop in with an update.
EDIT: broken links earlier.