Microsoft doesn't consider IE a browser anymore, they call it a "compatibility solution"[0][1]. If a site looks bad in IE, I think that is ok these days. (functional but ugly, is there an industry phrase to encapsulate this idea?) IE 11 was released 5 year ago...
Thank you. I guess I always considered that a phrase regarding features where a browser doesn't have a feature yet, but will in the future. But I guess it works well for the other direction as well.
(ie, a browser that will never have any new features)
Progressive Enhancement: Starting from some baseline, ideally static content, and building in features that newer, usually visual browsers can support
Graceful degradation: What happens if things don't work perfectly, or some browser doesn't support a feature, or network connectivity is shit so your js file doesn't load.