Again - fully agree with you - 386.5_2 was a great version ... and interestingly based on a widely released [across several router models] Asus stock firmware version GPL 386_
46065.
Do you have any idea if the RT-AX86U was manufactured in multiple different factories - with the possibility of some components not being of the same standard across the board? I recall we had that curious period where a bunch of RT-AX86U's got bricked after Asus released a new stock firmware [which was rapidly withdrawn after Asus had to replace the bricked ones]? Some were fine - others were bricked.
Could this have triggered the development of the RT-AX86-
Pro with some upgrades and a push for greater component consistency?.
I and many others enjoy your contributions to this forum - even though you comments may at times be a touch "acidic"
.
Please don't pack it in - and don't ditch that RT-AX86U
.