Comment by paxys

Their description of the site and its usefulness is probably correct, but I think people are taking the wrong message from it. Mcmaster.com isn’t good because of its UX. The service would be exactly as useful had it looked exactly like Amazon.com. Its UX is simply secondary to its inventory and logistics.

Simply put - to build a successful business focus on the entire business and not just the website. People can get over an unintuitive UI and slow search. They cannot get over the fact that you don’t carry what they want.