Ubiquiti aren't the only ones. OpenWrt (and, by extension, GL.iNet) explicitly refuses to forward .lan DNS queries to public resolvers. This is a good thing: "LAN" has a singular, unambiguous meaning that directly contradicts its use as a public TLD. The fact that we're even debating this is outrageous.

Or ICANN could just do the right thing and reserve .lan as well, which is so much more intuitive and memorable.