Average Joe does not know anything about CPUs, but when they are out to buy a new computer they can see the prices of a new DDR5 computer vs an older or used DDR4 one.
Do they even know what DDR5 or DDR4 are? Best Buy still sells 10-year-old laptops, and people buy them. CPU power means nothing to the average user. They do not know anything about RAM or CPU. Maybe here and there, a little disk space knowledge, just because they are familiar with the concept of disk space because of their phones.