My newest car is a 2000 and I've lost my electronic tachometer already. Since it's an automatic, a tach is just a toy, but I do miss it. I rarely hear or feel the car shift, so it's nice to watch it happen on the tach. I checked to see if the unit could be fixed and my mechanic started rubbing his whiskered chin. When he does that, I know it's going to be expensive. Needless to say, my tach is still broken.
I just can't imagine paying money for a built in ANYTHING these days. I'm sure a GPS system would be a fun toy, but I still use maps or print out directions before I go on a trip. Certainly, there are advantages to these units, but I'd never pay extra to have one built in. And I made that decision before I began hearing about all the problems folks have been having the past 2 or 3 years with the built-ins.
Electronics are amazing - in all their forms. No car built today is free of computers and other electronics. Unfortunately, these improvements come at the cost of making the car an expensive paper weight when something goes wrong. Back in the day, I could keep a an old Chevy or Ford running, long after the mechanic had recommended last rights. Now, a new car may "break" and the only thing wrong is some burned out micro transistor on an obscure chip someplace. Only specialized equipment can even determine which chip and where it is. If replacing the chip doesn't work, you still pay for the switched out chip and start looking for another. So, why would I complicate my life by intentionally adding more electronics when a map will do 95+% of the time? End of rant and YMMV>