Now, I did not report the latest font change to comments here, because it does not pass the test for posts here: a user not being able to tell whether the UX change is a feature or a bug. This is clearly an intentional change.
So I’ll link to this post on the comment font change instead: A letter to Quora on typography by Martin Silvertant on Typo/graphic.
But I have just been confronted by this quilt of comment fonts:
Sans serif for the notification of the comment. Spindly Illegible Serif for the actual comment. Sans serif for my response to the comment.
And you know, I just gotta wonder now…