The nail in the coffin for me on W|A was requiring a login in order to copy plain text results. (Even though the same data is copyable in the DOM, they actually go out of their way to obscure it!)

I don't think people understand how noxious this registration-obession is, especially when you need utilize it to access basic functionality.

I don't really go to W|A anymore unless there's something specifically math or statistics related that I'm looking for. That action killed any kind of casual use for me.