Earlier quoted context omitted.
My nomination is McMaster-Carr (mcmaster.com) - They have a huge catalog of parts/tools yet somehow it's so intuitive to browse. I was a mechanical engineer in a previous life and McMaster's website was my bible. Step one for any new prototype design was to browse this site. Best case scenario, you could cobble together your prototype from various COTS (commercial off the shelf) McMaster parts. And if that wasn't an…
I like McMaster-Carr, but I often hear them being held up as a positive UX example when, in my experience, their website is endlessly frustrating. They often force you into choosing arbitrary categories too early, break tabbed browsing expectations, and have a frustrating mix of metric and imperial measurements that can't be escaped. Their pricing is also generally at quite a premium. For example, let's say I want a…
Getting things custom made is expensive, so customers are pressured to use what's widely available. Stocking lots of things not widely purchased is also expensive. These forces have been working for a long time to give us a pretty wide selection that covers most uses.