What changed?

Kevin Spacey had many people accuse him. But he was cleared of all charges, and no-one seems to have evidence. Honestly, I suspect he was an innocent victim of #MeToo (an overshot of the direction that rightfully convicted people like Weinstein), and may get a revival soon (the last charges were settled in March, see the vibe of https://old.reddit.com/r/changemyview/comments/1q45z9e/cmv_n...)

Altman has an accusation from one person with no evidence.

That in turn led to more concrete public allegations against Spacey, which he tried to deflect by “choosing to live as a gay man.”

[0]: https://www.nytimes.com/2017/10/05/us/harvey-weinstein-haras...

It's not a vibe, its a factual description of the circumstances.

Not sure what the comparison to Weinstein and Spacey in the year prior to the main accusations against either becoming public is supposed to be about, but the accusations against either, when they became public, were substantially different in scope and evidence publicly available to those against Altman. Which is not a statement on the merits of the accusations against Altman, but it is relevant to the potential for meaningful, substantive public discussion.