Already using one RP-AX56 for an AiMesh node and while I wouldn't call it rock solid, it can hum along for several months without any issues. And when issues do arise, most of the time I can pull it from the wall, wait a minute, plug it back in & 9 out of 10 times, it comes back on ready to roll. I found the RP-AX58 for the same price so I opted for the newer model. As an extender or media bridge, it's fine. But for AiMesh, it is for all practical purposes, unusable. First, I know adding nodes can sometimes take voodoo to get to work but this one is incredibly frustrating. Using the app & the web interface, I went through the setup about 40 times (not kidding). It would find the node but never add it to the mesh. But thru just brute force, eventually, for no obvious reason, it would work. After that, 15 feet from the main router, it would report a weak signal (where the AX56 reports Great). It would drop off the mesh several times a day and rebooting...well, just plan on unplugging/plugging it back because it's not reconnecting on it's own.
With that said, I bought a new product with no firmware updates yet so that is on me. And I imagine if they work on firmware updates, it will be a good product. But at least for AiMesh, it isn't ready. Stick with the 56. I just assumed that the 58 was a faster 56 and that is definitely not the case. It's strange how a seemingly minor upgrade could change its reliability so much.
With that said, I bought a new product with no firmware updates yet so that is on me. And I imagine if they work on firmware updates, it will be a good product. But at least for AiMesh, it isn't ready. Stick with the 56. I just assumed that the 58 was a faster 56 and that is definitely not the case. It's strange how a seemingly minor upgrade could change its reliability so much.