I think the Abandoned tag is justified. Doesn't matter if the game is free or not, it's been 3 years since the last update.
Honestly, the dev is coasting on people's good will and expecting them to take his word for it when he says he's "working on it". It may be so but without concrete evidence, he could claim to be the prince of Saturn for all we know... IMO pictures alone do not quantify as "evidence", not when it has become a repeated excuse over the years. He's an artist, it's not difficult to make some fancy pictures and call it "progress" just to keep people stringed.
Any other game under the same circumstances and people would roast the dev alive, but since Teraurge is pretty niche and unique, they are willing to tolerate anything just because there's no alternative to look forward to. It has become a bit of a sunk cost fallacy; people been waiting for a long time now, what's another two or four years in the grand scheme of things? Either that or they don't want to admit to themselves the possibility of this being one big waste of time, a lie or a pipe dream.
Is it really so hard to release an update per year, even if incomplete and buggy, just to prove progress is being made? Is it really? I mean, at this point he could just pull the project off the internet and make it private... not that different from the current situation tbh. Bring out the faceplam emojis and call me entitled. I don't care. The game is promising but it's been 3 years, people are well within their right to assume this is dead until proven otherwise.