Every time I could not find and answer to a question in a man page and consulted info, it was a waste of time. I like info, really, but the remark at the end of most GNU man pages to look at the info pages is misleading at best.

For emacs stuff, yes, it's very convenient. I remember once upon a time, Python docs were available in info as well. When you have good documentation available in info, it's very nice.