Yeah I don't get this "SourceForge, once a trustworthy source code hosting site" -- that is simply untrue. Maybe for the 1st year or two after its launch, but it has been subject to all sorts of crappy management since at least 1999/2000. I used to have projects there, and contribute to projects there (argh memories of terrible CVS) and it was always slow, always had a terrible UI, and very early in its history became submerged in bad ads and out-links to bad content.
That you misremember it or are too young to know better doesn't mean that it "is simply untrue". It's not, it was valuable for many years. It's your revisionist history that is simply untrue.
It's not revisionist, I'm 40 years old and have been consuming and participating in OSS since before SF existed. It was painful to use, even in the context of the times. Granted, there wasn't really any alternatives in the first few years of its existence.
It should just die.