I'm on a MacBook Pro (M2 Pro) with only 16GB RAM. I mean, I'm running 4 different JetBrains IDE's, 3-4 docker containers, Chrome, Mail, terminals, and a bunch of other stuff and it's never laggy (almost feels like magic coming from Intel to Apple Silicon).
16gb is plenty, an intern we had ran a M1 Mac with 8gb of memory and running a browser concurrently with Figma made everything slow down to the point where he went around asking for advice.
This is my use case, 4 ides. Chrome and docker, its a 14’ M1 Pro, it works nice, but im not installing tahoe any time soon xd