Dev does this as a side project of sorts when he has time if memory serves right, so updates have always come a bit sporadic. Sometimes there is nothing for year and other times like 2-3 versions within a couple months.
Well he does have a Patreon and is supported by people so it's more... or at the very least it should be.
I admit I gave up on the game and droped my pledge around Version 0.14 or 0.15... around the first time he went silent for an entire year without Updates.
I keep watching testing the waters wether or not this game and it's Dev will eventually come around and give some detailed timelines and be upfront on communications... but it's very likely this kind or game.
Nice to play but not worth to support it long time.