I am heavily invested in Apple for the record. I use everything from Mac Pro, iMac (all versions), all of their MBPs (no airs), iPhones, iPads etc. I have invested over $30k in their hardware, so that gives me some right to criticize their direction.

All of the computers have been updated post purchase. I've put more RAM into iMacs, more RAM and SSDs into MBPs, and Mac Pros got more RAM, video cards, SSDs, HDDs etc.

In fact, one of the very first things I do is buy more RAM for my MBPs because it is more economical to do it yourself. Then if you wait 2 years, you can again double your RAM for extremely low price.

If Apple were making only this harder because of physical design constraints, you would have a point. But they are also artificially constraining the OS to make it more appliance like, and less and less UNIX like. But that's OK. Most of the users wouldn't know UNIX from eunuchs anyway.