Linksys - WRT1900AC

I can’t speak to the wireless performance since I use Unifi for that, but my WRT1900AC has no problems with gigabit internet and can even SQM up to about 600Mbps.

No, I already knew this. WPA3 and MU-MIMO are not working on 8964 I own both WRT1900ACv2 and WRT3200ACM, the 1900ACv2 uses different WiFi chip and it has slightly better support than the 8964, even with this the 5GHz WiFi is still not very stable (I use it in office now and it has short interruption many times in a day)

Well, timing might not be accurate, but no matter how many commit there were, does any of them ever bring back the "MU-MIMO" back? Most of them are just bug fixes to existing thing. The driver was abandoned by NXP since the day of acquisition, this is a known fact, the community could hardly make any feature improvement on WRT series, the WRT1200/1900 series also didn't get much break through until recent 1-2 yrs (that's why now I am using my WRT1900ACv2 but not WRT3200ACM) I don't know why you keep sticking on the "almost a decade" thing, it's not helping at least OP to recognize the fact that the WiFi on WRT3200ACM is bad.