Your setup is ideal but if someone didn't have ethernet in every room or the ability to have this setup, mesh is the next best thing.
Agree. I used to have ethernet everywhere but since moving house I've struggled to connect the house extreme rooms together without going full ethernet (too difficult to rewire). I have Powerline but it only works "well" within half the house (power installation spurs etc). I've tried Netgear but now I'm choosing between two of these Ubiquity routers and two matched Asus routers.