I doubt there will be a huge migration. I think it's already a small minority of users holding on to "old". I've seen people on social media asking, "why would anyone use the old and broken Reddit design?"

Maybe I’m a curmudgeon. To me the browsing experience and content density is night and day favoring the old style.

On the app I get 2, maybe 3 posts per screen and at least 1 ad taking up 30% or more of the screen. I don’t see how that’s an objectively better user experience unless someone desperately needs glasses.

Another factor is that communities can’t use CSS to style their pages with the new site. /r/nfl for example is a thousand times better with their CSS than the few tools for differentiation Reddit provides.

I'm a moderator of a fairly large, nontechnical subreddit-

Reddit allows you to see your subreddit's statstistics, and the last time I checked, around 1/3 of our traffic is from old reddit. So definitely not just a small minority.

(Then again, it has been around a year since I checked, so perhaps the numbers have shifted.)

I mod a top 50 sub and less than 15% of our pageviews are on old reddit.

The number used to be falling much faster, but seems to be falling in a somewhat stable fashion around the 15% mark over the past year.

Is this based off the subdomain? If so the numbers might be flawed because logged in users that have the legacy design option selected in their user options would still possibly show up as www.

It's directly from the Reddit traffic page. I'm not sure how they categorize pageviews.

Always viewing in old.reddit.com is an account setting. There are also extensions out there for Old Reddit redirection. Also, the Reddit Enhancement Suite is highly recommended for any desktop browsing.

They reset that account setting literally every week because they don't want people to use it.