Nobody in this topic ever said you could max your settings at 1080p, even on a 7800XT or a 4070. Let's keep our expectations in check here... There is only relative performance in my world. Games advance anyway. There are no 1080p or 1440p cards. There is only a card and the factor of time plus what you want out of it.
You can get a 6750XT over here at 380,- EUR
The 4060 is 329,- EUR - and that's built on a substantially lower quality board at that price (low TDP = cheap out on VRM and more).
Even if the 6750XT wasn't faster at 1080p you'd already just pick it for its 12GB, which games can readily use even now at 1080p.
If you must get the 4060 because you made up your mind, by all means. Its not my loss if your games start stuttering

I have the experience on a similar powered card (with
double the bandwidth of a 4060, mind) and 8GB in current gen games. Its not pretty.
You came here for advice, remember.