I wish apple would make two pro laptop machines, an ultra portable, which is what they have now, and a "workhorse" edition. The workhorse could be thicker, with bigger battery, more powerful chip(s), two ssd slots, up to 32gb ram, FireWire, Ethernet, etc.
They could certainly still make an elegant solution, but this would truly be a portable desktop. I think this is what a lot of pros want. We'd spend the money as well. I'm still with my 2012 MacBook Pro since they haven't made a user friendly upgradable machine since then. I remember when Steve Jobs introduced laptops that were easier for the consumer to upgrade. Though his machines weren't cheap, he certainly felt that getting the Mac into more hands was more important than a giant margin. They are so rich now, you'd think they could do more with the Macs