I get a chuckle out of colleagues who ask for copious RAM today, and while I'll usually show them where they can put money to do what they actually need better, this kitchen analogy suffices for most of their use cases:

The hard drive, RAM, and CPU are like the fridge, the prep table, and the stove. In the days of high storage latency and low throughput mechanical storage, it took a few weeks to gather ingredients from the fridge and bring them back to your prep table, so it made sense to buy the largest prep table you could afford to save yourself the trip. However, your stove only had one or two burners, so you were still waiting around for one thing to finish cooking one thing so you could move on to another.

Today, high bandwidth, low latency storage like NVMe means you have an always-on instantaneous portal to the ingredients realm so there's no real need for the extra-large prep table. It's usually better to spend the money on more burners for the stove so you can keep it as busy as possible and get the most work out.

It's a vast over simplification, but I can't help but sigh when someone says they literally cannot do their job without 64GB of RAM and then choose a quad-core or some low-power series laptop.