I use it as one of several sites…there are some things they are still the best / most convenient for. For cheap chinese crap (which is often all I need for small projects etc) temu and aliexpress now undercut amazon considerably. For quality items that are ok to buy used, ebay.
ANYTHING that costco sells will almost always be the best choice, but they have a very limited selection.
So in short, amazon is very much still in play, but as one of many, not the go-to anymore.