I very much doubt the conclusion that a lack of clearnet alternative means people have assembled on TOR. That's ludicrous honestly.

There have been a number of reddit alternatives over the years, typically the result of some act of over-moderation that drives angry people to alternatives. These always become cesspools of hate & racism because they advertise as 'free speech' alternatives (due to swinging too far in the opposite direction that drove people there in the first place).

I think most people who want to use the old interface are simply just using the old interface. Until they completely drop it I don't think that will change. Because anyone can start a reddit clone but it's useless until you can convince a mass amount of users to switch & stay there, which is extremely difficult.