What you can expect with your Orbi system

Roamabout - the good news is even if you start to have the same problems, it's nowhere near catastrophic.  The worst for me would be losing connection in the middle of an action game and not being able to get back in time before the match was lost.  In general it manifests as a freeze or lockup, so it stops you in the middle of whatever you were doing involving the internet (downloads, games, streaming, etc).  Sometimes it comes back on its own, other times you can disconnect and reconnect wifi, and at very worst you have to power cycle your satellite.

I'd call it a major annoyance, but one that if you know about it in advance you might be able to mitigate.  If I was going to keep using Orbi, this is what I'd do:  the most important stuff I'd connect via ethernet, to the modem if possible.  Next most important stuff, I'd connect via ethernet to the Orbi main router.  Position the main router so that you're using it for the max amount of wireless items (cameras, doorbell, etc).  Finally connect any Orbi satellites to a power source that can easily be switched on and off for quick reboot.  

Obviously you shouldn't have to go to these compromises as it kind of defeats the whole purpose of a system like Orbi, but if you really don't want to spend more money you can kind of make the most of it with what you've got.