This is an epic suggestion.
jjlinux
This is indeed sad news. I'll forever be grateful to him. He made the door that got me through into Proxmox. God rest his soul.
You are a man of culture. Great choice.
I did too, but never cared again after my wife finally switched over to Fedora. I have nobody else that I care about enough using windows.
Yeah, when forced to use Windows it's way worse because we know the other end of the spectrum.
I know, the irony.
You have the option to get a solid hardware that you can install openwrt on, and then use the Deco mesh just for the Wifi. That'll give you similar, if not the same results, and save you a few bucks in the process.
I just started migrating my network from PFSense, a bunch of tplink switches and Aruba InstantOn APs to unifi. I'm almost done (just missing a couple of APs more and 1 more switch), and I honestly am extremely happy with the decision. The Unifi APs are not as powerful as the Arubas, but the improvements to the performance of my network more than makes up for that.
I apologize. I misunderstood that you were looking for a mesh system that would work with an existing openwrt router. Seems what you're looking for is a mesh system that can be flashed with openwrt.
For that I can only suggest that you look at the supported hardware table and see if you can find what you need.
Editing my previous comment for my mistake.
~~If you're not looking to segregate your network or any other "advanced" network feature, you can't really get better value that Tplink Deco.~~
Edit: I misunderstood what the op was asking for. This answer is not valid for that.
It makes me very happy to see corporate assholes going at each other's throats.