Tildes is another website trying to be the new Reddit.
Tildes is very much not trying to be a new Reddit. And certainly not the new Reddit.
Tildes has a clear vision for itself as a mature forum for long text-based discussions, with the trappings of a link aggregator.
There are no image posts (although posts may link to an image), and memes and shitposting are discouraged at best. There are also no user-created communities (subreddits) at this time - although there may be in the future.
If you enjoy old-style discussion forums, you'll probably enjoy Tildes - but it's certainly not trying to compete with Reddit, Lemmy, kbin, or anything else. It's doing it's own thing.