I had two 2jz's in my car, one was a 2jzgeT (7m electronics) and 2jzgtte. Both died from crank issues. The geT died from oil pump failing, and the 2jz died from crank walk, and keep in mind that second 2j was stock. Got a refund from the guy who sold me the motor, and sold the whole setup to someone else.
I bought a SC400 awhile back (before the supra) for a daily, and it had 226K on it, it's still on the original motor, I sold that car, and see it once in a blue moon. The new owner has put almost another 20K on her. So it's pretty reliable. And keep in mind I ran a 100 shot of nitrous through it for half the time I owned the car. And I beat on it, a lot lol. And it never missed a beat, the worse thing that had happen to me when I owned the 1uz was my ecu taking a poop, but as most people know, it's common in Toyota ecu's anyway.
I have a 1uz five speed turbo in my MKIII, and I did it all for about 2K, maybe a bit more, but I see boost instantly with my turbo, sure it's not as fast as what my 2jzgeT, but it has a lot more low end power than both my 2j's combined. I love the fact that I can shift, 1-3-5, and I never have to downshift on the highway unlike both my 2j's.
Sure the power potential and ease of parts make the 2j very very attractive, but the sound and low end torque that's provided, and plus the piece of mind of this tank of a motor Toyota designed makes it all worthwhile to me.
If I could go back again, I think I would've gone the N/A 1.5uz instead though, but knowing me, I'm addicted to boost, so I probably would've have turbo'ed that anyway lol.
IMO the main things that kill this motor (for power) is lack of engine management, our stock ECU forces to run pig rich (though good for boost), and it's real conservative in timing. But you also have to remember this motor was designed to be smooth and quiet, and what we're trying to do is to make it a screaming demon lol