Ask HN: Is it ok to quit without notice?

Hey HN, I'm looking for an opinion. I'm in a terrible company...the environment has become incredibly toxic, almost my entire department has quit, the company is hiring a new CEO but the "interim" CEO has acted purely out of self-interest and in his maneuvering, has gutted half the company, ruined some relationships and destroyed the project I've been working on for a year. I have an offer for a much better job coming in, and I don't feel like I can manage another day in this environment. How bad is it for me to just walk away? I've already documented all of my code and processes and handed most of my responsibilities to the overseas contractors that are apparently intended to replace me. Thoughts?