Ubiquiti is all cloud based. If the government wants in to your auto-updating ubnt hardware, it's just a simple court order away. They don't need a backdoor.
I'm still using the access points, since I can run my own controller still, either virtualised in a container or VM, or a raspberry pi and you don't have to connect it to the cloud. I haven't found anything better, TP Link seem to have some interesting looking stuff but I worry about the security given they're based in Shenzhen...
1. https://shop.opnsense.com/product-categorie/hardware-applian...
Perhaps there is some new watered down usage (like what happened to "literally" or "bricked") but that is precisely why people use the term "air-gapped" - to denote networks with PHYSICAL separation from other means of access.
(Of course, if you connect an AP, it's no longer air-gapped."