See, it was just the MAF sensor. Sensors go bad every once and a while.
If it makes you feel any better the current 4Runner is based on the Prado(sp?) that has been around for a while in Japan so it's not really totally new.
The 4wd system is relatively simple (yet excellent) with the torsen center differential and should prove to be bullet proof and possibly more reliable than solenoid actuated part time systems.
ASC and traction control and all that stuff is just implemented with computer control of the ABS system and as we all know ABS with computer control has been around for a long time.
So, I wouldn't worry about it too much, all the key technologies in the 4Runner have been around for a while.
- Steve