If there were a free and open source game which was an exact* clone of Minecraft beta 1.7.3 (circa 2011), with multiplayer support...
Would you play it?
I used to work on a piece of software something like this but dropped it due to lack of time. Now that I work on FOSS full time I have time to pick up an unserious project. I would rewrite it from scratch though, my old codebase has some serious systemic problems.
* Exact in terms of available blocks/items and their logic, compatible network protocol, texture pack compatibility, and supporting Minecraft beta 1.7.3 save files (aka Anvil saves); but not bug-for-bug compatible, not compabile with historical Java mods, and with improved performance; as well as very conservative inclusion of future features after compatibility is achieved
[ ] Yes please [ ] No please