It doesn’t matter how much time, money, or energy went into building the thing—is it still helping you get to where you want to go?
If yes, keep going.
If no, quit.
I’m facing this with one of my own creative projects right now. It’s been a significant part of my identity for most of the last decade, but it’s feeling like time to let go. Not because I don’t love it, or can’t do it, but because it doesn’t fit into what I want for myself now. We’ve gone as far as we can together. And that’s OK.