For those who aren't in Ero's discord. This game won't get abandoned (never say never). Earlier this month he quit his "real job" to put more time into this game, yesterday he stated that Demon Boy will always be his first priority and i quote -"But if I'm working on a creative project, sometimes I need to step away from it for a while to regain some perspective". So this other game shouldn't be anything to worry about, (could be nice content, who knows).
I myself work as a game dev, and this behaviour shouldn't be seen as something negative, crunching and burn outs are a common thing in the industry, we should count ourselves lucky that we get some content while he's recharging, some devs tend to do something entierly different that won't lead to any content what so ever. ( I tend to paint, read books or taking a trip for inspiration/relaxation).
The only thing to be sad about is the censorship that Patreon is up to :/