Well, monday is the .55 Alpha drop. and later this month, maybe early June is .60, which is a VERY major patch. We get an automatic update system, a new biome, Several new creatures, at 10 more quests, major quest overhaul, major combat rework for melee, major forest update, major new Settlement system.
There is a LOT coming out.
Compare this with other games like Minecraft who wait 6 months, just to add Horses?