I'm okay with only two rings per finger.
My problem is that magical rings are just too easy to find at higher levels. And the only thing most are good for are vendor fodder (aka selling).
At higher levels you get too many very high level rings. Seems like I have a jewelry box with maybe a half dozen Mundane Rings. That's just too much I think.
I too wish we can wear 4+ rings so we don't waste any we come across.
If only we can wear 2 cuirasses and 2 gloves and 2 boots and 2 greaves for
extra warmth in the north towards Bravil.
...
Bravil can be very warm and swampy. But that might come in handy in the cold mountainous town of Bruma.
Bind them. For certain builds I'll bind six rings, that way you have a ring on each finger.
No binding (in the unmodded game).