4J Studios, a company that made Legacy Console Edition of Minecraft, is currently working on a sandbox minecraft clone called Reforj.
It has some rather interesting features in its engine, and their Edition of the game is/was known for good performance so it might actually be good enough to be played like Vintage Story
"An announcement from 4J Studios..." is going to be premiered in about a hour https://youtu.be/RjyUhpXEew4
I believe it will be an announcement of public alpha