For me it depends on what we define as "theater experience":

I absolutely never care about the rest of the audience (unless they'd be actively annoying). The Part where it forces me to pay attention is the biggest draw. And the technical aspect (better/larger screens) only matters for certain movies ever since i got a decent sized oled tv. So i'd go see Oppenheimer if there were an IMAX cinema in my area (which sadly isnt the case) or i went to see Avatar 2 last christmas, because i think there the technical aspects matter more. There i went to see it on a large screen, whereas otherwise i often choose smaller independent cinemas, whenever i go. Next one is probably gonna be "Past Lives".

A membership sounds nice, but i feel like i wouldn't have enough movies i truly want to see to justify one. Also i think the one that's available in my city that i know of would be 20€/month, but not truly unlimited but 8 tickets/month (but i guess that is still plenty to see everything).