Any kind of source that requires rendering is inherently fragile. We’ve all seen old posts messed up by a template change. There is no reason to think that GitH

Any kind of source that requires rendering is inherently fragile. We’ve all seen old posts messed up by a template change. There is no reason to think that GitHub will live (and continue to render markdown) much longer than, say, GeoCities. The simplest subset of HTML you can manage coupled with an uncomplicated layout and no external assets is better in terms of longevity.