I think the difference is the marketing approach. HomeDepot takes a very modern approach of controlling and measuring everything the user does. This needs a ton

I think the difference is the marketing approach. HomeDepot takes a very modern approach of controlling and measuring everything the user does. This needs a ton of code and some absolutely ridiculous stuff no one here would ever build if they were told to redo the site. The McMaster-Carr mug is an example of marketing done right. It says "we're here to do precisely what you want in exchange for money."