Older Version then 0.0.9a Confirms to exist by Notch himself
From The Lost Media Wiki
A version older then 0.0.9a Confirms to exist by Notch himself when I asked on Twitter about a old version of Cave Game with no grass, only Cobblestone to test Cave Generation. (I asked since I keep remembering it for many many years, and couldn't find anything online..) (Thread) https://twitter.com/notch/status/1658580852241207296
I'm currently looking though all my old hard drives to check if I still have the file.. I'm going to be posting updates on my findings on the Discord..