I read and posted on Slashdot daily in the early 2000s. Back then then it was all about politics and inaccurate/flamebait semi-tech stories with the credibility of a tabloid. So, I don't think Slashdot has really changed.
Slashdot's audience, however, has largely moved on and the cultural significance of Slashdot has been taken over by other platforms.
It was much better in the 90s and very early 2000s.
The creation of the politics section, Sept 2004 was the beginning of the downfall, in hindsight. The site really kept changing for the worst from then on, and the latest change in ownership turned it into complete trash.
Slashdot's audience, however, has largely moved on and the cultural significance of Slashdot has been taken over by other platforms.