Needs to be said more often

Absolutely. You can put a world class system in an awful sounding room and it will sound terrible, as attested by many a poor demo room at shows.

But I’ve heard some very basic gear over the years in properly designed and treated rooms, and they sounded fantastic, punching way above their weight.

Only problem is you can’t sell a room as a product and the WAF on large studio grade diffusors is extremely low. And most people can’t/wont restructure their listening room.

But yes, the room is probably 50%+ of what you hear in a system, you’re sitting in a giant box after all, the remainder is the system, with the speakers being top of the system chain.