I bought a new router, its all working and seems to be pretty good at this point, except one thing... I had asked previously about the downsides, if any, or WPA3 security, particularly if you need to keep WPA2 on as well for legacy stuff. So I have this Asus AX-RT56U router up and running. WPA3/WPA2 enabled, so my more advanced items can use WPA3. I update the firmware, and WPA3 goes away - no longer an option... Not sure why... But here's the weird thing: Everything was working, including my oldest devices, before the firmware flash. After it, my 2010 MBA would not connect. No matter how many times I entered the SSID passphrase, it wouldnt connect. I changed the security to open for a minute, to see what would happen. The computer connected fine. Put it back to WPA2 and no dice. But it connected fine using WPA2 minutes before. And its only this one machine - 2010 MacBook Air, running 10.12.6. I reset PRAM without luck. I then went and got the Merlin WRT variant of the Asus firmware just to try. No luck. It just says that my Wi-Fi network cannot be joined. Diagnostics is useless. Ive removed/forgotten the network and reconnected. Since I can unhide the SSID passphrase, I know it is correct, no caps or other issues. And every other machine works. Any suggestions? Im not going to keep the stupid thing if I cant get all my regularly used machines to connect. Its ridiculous. But I know that it can and will connect, because it had done it. In fact, I had flashed the firmware update from that very machine!