@Yarzy I cannot speak about running the latest firmware on multiple AX86U's (as I only have one) but it does sound like a minor cosmetic issue so far.
@Keenan Logically the more differences in hardware between mesh components the more opportunity for incompatibilities.
However I had read within these forums (quite a while ago)...
Try not to combine AiMesh devices with very different antenna numbers (Not sure if it's 100% true) but I suppose it could make some sense.
On my family's Home network...
-I have an RT-AX86U primary & (1 or 2) RT-AC68U Nodes... Note: All router types are still the Three External style.
I have been contemplating upgrading at least one node to an AX but...
In real-world performance terms:
-It's typically the slowest Client & NOT the router which slows down your network +
Our current IP package is an asymmetrical 300/10Mbps (Which can pull 330/15Mbps maximums)
And when I look at most of Clients that are like 2x2MIMO... in reality an actual throughput of like 455 Mbps (±45 Mbps) when like 25 feet away is expected.
It certainly doesn't make me keen to throw down lots more money for better router tech.
Besides with WireGuard & other advanced features disabling HW acceleration the sweetspot seems to keep hovering around 300-350.
Hence I Don't see the point in paying for more speed that I'll never really use