I am looking for a new cable router for my Virgin media super hub 3 in
modem mode.
I have a Asus rtn66u, but Asus are no longer doing any firmware
updates.
So, I have looked at: ASUS RT-AC86U vs ASUS RT-AC3200.

I am leaning towards ASUS RT-AC86U. Since it is newer (so it will get
more firmware updates in the future), has a far more powerful CPU and
greater quantity of RAM vs ASUS RT-AC3200 which came out in 2014.

When is the newer version of wireless protocol coming out?