Newpipe and Freetube are YouTube frontends, so all the content is there just without having to sign in. If you only really use a subscriptions list and directly related videos as your way to find youtube content, it's a drop in replacement. If you want to use google's recommendation algorithm though,I don't think anyone is going to be able to recreate that experience any time soon.

Thanks, that’s good to know - I’ll check those out.