Tundra sales are slowing probably because everyone that wants one currently has one. Though they do have a lot of dumbass problems with that truck, I wouldn't buy a truck from a foreign automaker until they've been making one for a couple years without any glaring or dumbass problems.
I take that same mentality and apply it to just about everything that is made. I don't buy a computer until the OS on it has been out for a year and has the bugs fixed, I don't buy a new model vehicle for a couple years so that the bugs can be worked out, I don't buy cutting edge anything. I'm kind of a dinosaur that way. But that way I also avoid being a beta tester for all these companies.
