To each their own. If it's particularly painful to separate, but we both agree it's for the best, then cutting contact is the most appropriate thing until the attachment dissolves and we're able to rejoin each other's lives in friendship. If things became toxic, or violent.... no contact ever again. In my experience with the latter, rarely does that toxicity disappear in those people. They merely learn to hide or mask it better with each new relationship, and the realization that they may need to change/grow comes to them incredibly slowly.