Unlike the prior nag screens, this one was modal, blocked any scrolling, and had no way to close it. It seemed to pop up about 15 seconds after I first start scrolling any page - either a list of threads on a subreddit, or a thread page itself.
Man I miss the old iOS-looking Reddit mobile (m.reddit.com, IIRC).
My Reddit account is now just a few months short of US drinking age. I've been using the site since before subreddits were a thing (back when the only topic-specific alternative to the general front page was programming.reddit.com). I've posted a lot, modded some, and stuck with them through a lot of stupid decisions over the years. But I'm beginning to think it's finally time to move on; I'm just not sure where to.
It seems to be using some cookie system that is bypassing this for the moment. Older machines I have still can use it without issue. But a fresh browser on the same connection will be prompted for the login.
Regardless, it is clear what direction this is going in. Age verification is also being tested in some places.
Let's see how long it will last. Started yesterday during the evening.