I'm on the same boat, although I have an additional requirement that disqualifies Sublime Text: I want the software to be source-available. Not necessarily FLOS

I'm on the same boat, although I have an additional requirement that disqualifies Sublime Text: I want the software to be source-available. Not necessarily FLOSS, but I want to know that if push comes to shove I can hack the code and recompile the software. I don't want to have to rely on the devs if I want to tweak something that's not meant to be configurable, or if I need to run the software on some unsupported configuration and it breaks.