Unless Unix dies a swift death for some reason or another, going forward there will be many more people who have to learn this than there are that have learned

Unless Unix dies a swift death for some reason or another, going forward there will be many more people who have to learn this than there are that have learned it already. Surely, once you're using those things on a daily basis it doesn't matter how inconvenient, illogical, or badly designed things are, you just know how to do them right. Is that a good reason to scoff at anyone who points out that things are badly-designed? Backwards-compatibility seems a far better argument in favor of keeping things like they are than »it doesn't bother me much in practice«.