Creator of Deus Ex Randomizer and other mods: https://mods4ever.com/
like what features are you wanting?
Lemmy already has the “New Comments” sort, which is the biggest feature of forums vs Reddit
Lemmy also has the “Chat” view for comments, which is good but needs to show context with them as my feature request here says https://github.com/LemmyNet/lemmy-ui/issues/2544
It will increase over time, and I think it would pass 100 GB in less than a year, but I’m just guessing. You can help reduce this by tweaking some settings with image caching/proxying
you will only see posts/comments/upvotes that happen AFTER you’ve subscribed to a community
when you subscribe to a community it will pull the most recent posts made but it won’t pull the comments or upvotes for them, just the post itself
this is why a lot of instances use https://lemmy-federate.com/ but that will use up a lot of your disk space
this is actually an option for instance admins to choose