I find McMaster awesome for product discovery. I can go and just start scrolling, see a interesting category and start digging into what is there. How on earth is Amazon better for this? Instead of just scrolling down and starting to click I have to open the side menu, expand categories, click on industrial & scientific, click on show all, get smacked in the face by a full page add, and then I get a nonsensical mix of lists of categories, new products, then back to a list of categories to hopefully get to where I want to go.

You need help finding something? On McMaster, scroll down, click contact and send a message. On Amazon? Google to find out where the shortest path to getting assistance that they have buried under a dozen submenus.

I will admit, there is one superior thing for product discovery, which is of course their paper catalog.