I think this has more to do with the fact that in most workplaces once something works it's taboo to 'waste' more time on it (or even if it's not taboo, it beco

I think this has more to do with the fact that in most workplaces once something works it's taboo to 'waste' more time on it (or even if it's not taboo, it becomes low priority compared to more 'critical' issues), than it does with the particular changes requiring super skills. Though I'd love to work somewhere that was even set up cleanly enough to do meaningful test profiling.