>>725630027
Same reason Haunted Chocolateer is in dev-hell now: all indie devs truly are one-hit-wonders who just got insanely lucky, and not even having the most popular game in existence under your development belt can guarantee your next game sells.
Unless you make a sequel or another game in the same setting, but the sequel has to actually be better and have more content (for an indie dev). Problem there is a lot of indies blow their entire load on one game because that's generally the best way to make an actually good game: put all your best ideas in at once.
So the Terraria team is basically stuck with Terraria until they quit or die unless they can somehow manage to make Terraria 2, which has to actually be better than Terraria 1. Oh and Terraria 1 has like a decadr of mod support that Terraria 2 would lack, so that's another issue.