As an over 9-year-old platform today, the RT-AC68U will be dropped soon. Simply numbers/fact. That is the major problem I see with that model. At least for the faster ISP speeds, many people enjoy today and for a long time now, for some.
That $270 router today will seem cheap compared to what's coming in 2022.
An AiMesh setup will give better
coverage, (again, simple numbers). But as you've experienced already, coverage isn't the only aspect of a good/working network.
I'll be repetitive here. An RT-AC68U that barely covers a home will be eclipsed by
even an RT-AX68U (let alone an RT-AX86U). The AX routers are current, well supported (now, and well into the future), and by all accounts offer long service just like the RT-AC68U has.
Words on a forum can't fully convey how your network and online experience will be by upgrading to it (please see my attempts to do so with my previous posts in this thread though). You will need to try it, in your home, for yourself. If after a few hours/days you think it isn't an upgrade, you can return the unit then.
Even an RT-AC3100 or an RT-AC86U will be an improvement in your network. But I can hardly recommend those models, today.
Here's my setup, and it currently works well for me, as far as I can tell. All Asus routers. AImesh routers, all 3 of them. Wired connect to each router, from the main router. All 3 used routers are freshly updated to latest ASUS software. GT-AX11000. Main router, in middle of the house...
www.snbforums.com
And maybe even more links than you'd like.
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