I would say for the stuff out in the woods, and certainly for anything 1/4" or otherwise suspect (homemade and clearly not bomber, rusted, etc.) if you're willing to spend the money and effort, and you know how to place a solid bolt - then go for it.
If you have thick skin then go for the ones on Cathedral and Whitehorse too!
In seriousness, all of the bolt controversy I've heard of involved adding new bolts to existing climbs not replacing manky old stuff.