Still, it's not ok to just blanket ban them. If they're not efficient enough for certain high performance areas, just don't use them there. I don't see why, for

Still, it's not ok to just blanket ban them. If they're not efficient enough for certain high performance areas, just don't use them there. I don't see why, for instance, they can't be used along with more efficient implementations, for instance in areas where parallelism and memory locality are not that important (for instance, for a menu or to hold settings). I feel that banning them altogether may lead people to implement stuff from scratch even when they don't need it, creating another possible source of bugs and vulnerabilities.