I don't believe Quora does this any more. They used to blur the entire page without a login but they relaxed that a couple of years ago now. I do notice that sometimes extended threads still seem to be behind a login wall but it's seems somewhat sporadic and inconsistent.

No it still does force you to login upon loading the page, can't proceed past. I know because it just happened to me.

Quora even manages to break Archive Today, which is pretty good with most other sites' stupidity.