Nope.
I also think 500,000 will be a very rare milestone to hit. A few might, most won't. Engines historically just don't last that long as a rule. As great as the Toyota engines are... Every time you start it up and drive it, it's wearing out.
Completely disagree. There was some who did a DCI on a 300k + 2UZ. There were still hone marks on the cylinder walls and crankshaft runout was within factory spec. Modern oil and a finely made machine can have last a long time.