Yeah, I guess my big reason for an Uzi would be because it's different and historic. I'm sure it would be fun to shoot, and the pride of ownership would be there. But as far as doing it's job well, there are other options that would make more sense.
I dont feel like I'd have much pride in owning a "MechTech upper" lol, but if it worked well, I'm sure I'd grow very fond of it. I just hate the idea of having a perfectly good Glock slide laying around while the MechTech is in operation. Maybe if I can hear from some people who have experience with them I'll be more interested.
Out of all the pistol caliber carbines out there, the ones that load the mag in the pistol grip of the gun are the most interesting to me. I like that it cuts down on the total length of the gun.