The Upside Down Codebase: Rewrite or Update?

If you haven&#x2019;t watched Stranger Things, stop reading this and go watch it. I&#x2019;ll wait. Back? Good. For the rest of us: Hawkins, Indiana looks like a perfectly normal American town. Diners, bicycles, bad haircuts. Everything where it should be. Except underneath it &#x2014; literally underneath