When 'base / clear' paint was first being used (probably for 10 yrs or so in the 80's mostly), there were a number of issues associated with 'peeling clear coats', but I haven't heard of these issues in awhile. There has been continuous evolution of paints and paint technology, some of which has been driven by government rules, and others by 'technology' and chemistry. Like today, when 'water borne' paints are predominantly used by the manufacturers, but that doesn't mean all you 'home painters' should begin using 'water borne' paints. There is nothing wrong with single stage paints, in fact, I prefer them for non metallic colors on older cars, as it can be made to appear more like the original lacquer paints (but much more durable).