Yes, the next version will be able to set up locally - you'll be able to install a single Darklang binary and run any darklang program without any further steps. See the explanations on https://darklang.com homepage.
The issue with the hard connection between the editor and language is that each change becomes a massive undertaking. Making a language improvement was much much much simpler than making the editor change to support it.
It was a bit hard to understand what is coming and what deprecated. As soon as i went into documentation I was send to "darklang classic".
How are the deployless senario now? Where you first serve only yourself then your team, then beta, then everyone... Or something similar to that. I really liked how that story was told and how much complexity it removed