Yr right - you're right. The cost is going to hurt, and it'll hurt more if an integrated circuit board dies in the middle of nowhere.
However, it's the way of the future.
AFAIK, general aviation is now the only place where we buy 1950s technology with 2010s dollars. No disrespect intended to that technology of course - it's rugged and durable. But cars, boats, trucks, racing cars, all have moved to fuel injection, electronic ignition, hi-tech fuel economy, replace-it-don't-fix-it.
It's getting harder to buy avgas too, although that's a different argument.