> if they find one edge-case that is not covered by your product they concentrate all their energy on it Having run into this many many times it's usually beca

> if they find one edge-case that is not covered by your product they concentrate all their energy on it Having run into this many many times it's usually because that little edge case is where the hard problem lives in the problem domain and is the reason, whether the customers know it consciously or not, they bought it. Who pays for something that only handles the easy cases? The author even talks about it with the "one specific thing" line. I guarantee it's that one stubborn edge case. It's likely you reached for a solution in the first place because you wanted something to turn a problem with a mix of difficulties into an easy one offloaded to a 3rd party.