Reforged SMP is a vanilla style server that was made by someone who always wanted their own world since they were a kid. Now they finally learned some coding and used it to build a server with a lot of care and planning.
The server has custom classes quests and weapons but it is still very easy to understand. Stuff is balanced so you do not feel lost or confused about what an item does or why a feature exists.
It feels like normal Minecraft but upgraded a bit so you get an enhanced vanilla experience with more things to do and still keep that simple classic vibe.
The owner clearly put a lot of thought and love into the design so it is made for people who just want to join and have fun without reading a giant guide first.
