Absolutely unit tests are a luxury. The simplest test is: What do you want it to do? Does it do it? Brilliant. Now give it to a couple of users. Can they break it? Done! I’m done with faffing. Coding for a million what-ifs (especially ones that aren’t super-obvious) takes time and effort and costs the client money. It’s the same with coding for a super-flexible system with features that will probably never be used. I’m sure we’d all be a lot happier if we can just think about what is actually needed then deliver a good product at a low cost and improve on it later IF need be. And as I’ve always said “you can’t code for stupidity”. Just like you can’t insure against it.