I'd be surprised if any of these devs you mention:6 years for a small game like this? No. 1 year would be a stretch. You had japanese devs making several games that have more length and have more scenes in the same time.
A) Have single digit contributors to the project
B) Are completely indie, even having a publisher that supports indie devs is a huge deal
C) Don't churn out RPGMaker slop, I don't care how much quantity they output if it's another generic, uninspired nothingburger
At least give several examples of developers that release anything of similar quality to Aurelia yearly. And aren't part of a massive company.