Yeah, I think a lot of people are assuming that 8GB will work as poorly on an Mx system as it would on an older Intel Mac. But it's widely reported that this is not the case. (The faster SSDs help, and I suspect that memory compression may work more effectively too.)
See various anecdotal reports such as https://news.ycombinator.com/item?id=26913643, or https://news.ycombinator.com/item?id=38103103 in this very thread.