I have the 8G M1 and my typical use-case is building huge notebooks in Observable, including one I’m looking at right now that has over 100 million datapoints loaded from a USGS web service into hundreds of separate plots and it’s fine. I’ve never run into the supposed limits.

I also have over 200 PDFs loaded in preview in the background, related to a law suit I’m researching. Still no issues.

ETA: I’m likely to replace my m1 with the m2 since the m2 gets +30% scores in common web benchmarks and heavy JavaScript hacks are my main thing. That should bring it up to par with my Linux box that has the top of the line Intel CPU.