The main topic of discussion with respect to instability and lagging was AC86U, not AC68U/AC66_B1. Different chipset platform.Or, they did not, depending on your own Asus Router and the specific config you've applied to it.
I sold my AC-68U - C1 to a colleague, way back when it was running 386.7 (Merlin).
He's since regularly upgraded it and is now running it on 386-12_6 (Merlin) without ANY issues on his (quite simple, to be fair) home setup.
Good observation. I wish I had been more diligent at logging this. I think there was a string of firmware releases after the last stable one where I was experiencing only partial stability, and by the time I realized the good times were up and this was not one-time off incidents, I was already a few versions along, trying to achieve stability with them. I also have an environment where I don't always get feedback from the other people in the apartment complex once instability occurs, particularly when it's intermittent issues.As @bibikalka said above, 386.7_2 was one of the most stable versions (GPL 386_48966), so it's worth a try, @heywire .
Then stability issues started occurring with newer GPLs, as far as I can see:
386.9 - 386.11 (GPL 386_50757)
386.12+ (GPL 386_51997)
I'm also hesitant of running such old firmware for security reasons. When there also are people claiming 100% stability with new versions, there is a drive in you to just get to the bottom of the issues. Unfortunately, I've too late come to the realization that anything resembling long-term stability is just not in the cards with Asus and their seemingly non-existent quality control; in particular the AC86U - it's simply a spin roulette with teach firmware update, at least if you don't spend an afternoon resetting the thing to oblivion and back, unless you have an ideal setup of like one single Asus client of the same generation connected.
I have suggested structured testing/benchmarking routines and AI scanning in order to identify issues that pop up across versions, but this was evidently not interesting because why solve problems in case they are "user errors" (which I mistakenly thought what the forum was for).
I also am considering doing a full reset of the router, but I have reset the router before when I had firmware-related issues, and it didn't help, off course. And one hurdle I have with respect to reset besides it's physical location, is that I have AC66_B1 routers where the Aimesh pairing seems completely bricked(yes, I tested everything, more than thrice, and so I cannot afford breaking the current pairing that actually works (tried to downflash fw versions, both official and merlin, years back, but was unable to restore the ability to pair. And before somebody comes along with the inevitable wise-guy whining about them being 10 years old, I bought these new around 2019/20 (AC66_B1 was released 2018, even if build on the same base as AC68U, another reason why it would be crazy to EOL the latter).
So, that is why I was also hoping for a new GPL soon, and that it would be a stable one so that we can re-calibrate around a new, recent 100% stable version.
And then, if I fall too far behind on stable versions after that, I'll just throw the whole thing behind a validated, 100% stable across time, opnsense/pfsense box and relegate the Asus setup with the stable firmware to only do the wireless, which I think will limit the security threats enough (only wifi exploits, which I think are less common, and has a far smaller target surface vs the whole internet).
Anyways, that's my thoughts, hopes and wishes in case anybody wants to draw on that.
(That is, if I don't end up in a white straight jacket before that, for running around in the town square, ranting and raving, warning everybody to avoiding Asus all together while carrying bits and pieces of the blood-stained routers dangling around my neck.)