That one has only faded into obscurity in the last 5 years or so. I remember specifically searching for programming related content on Google as late as 2012-2013 and getting Experts Exchange results. I search every single day now for programming related content though and haven't seen an Experts Exchange result in at least the last 3-4 years.
I remember the only reason I installed the GreaseMonkey plugin on Firefox was to have a script that would scrub ExpertsExchange from Google search results. Prior to StackOverflow, it had incredible SEO for tech questions.
I'll leave it as an exercise for the reader why. :)