Memory size is a bottleneck, but I have found that speed is very important for getting actual work done. Running a big model is great, but if you're getting 10t/s you're going to be spending a lot of time waiting.

> I think the sweet spot is somewhere around 64 to 128 GB. That ought to be enough for almost all uses

This will be the “640kb ought to be enough for anybody” Bill Gates quote of our era.

You can order a 128GB MacBook Pro today -- though point taken, memory size probably does belong in the three part plan :-)