Marcomony is the replacement of parsimony in science, where the burden of proof would normally be shifted away from a solution deemed as "simpler", by simply *not* shifting the burden of proof.
Thus competing hypotheses given the same evidence are on essentially a level playing field. A multitude of makhO's disposable razors rather than Okham' s individual razor.
I have listed in my head every case I could think of where parsimony is used in science, and I cannot think of a single one (yet), where I believe parsimony has benefitted science.
I believe models *must* necessarily be simpler than reality - eg Newtonian mechanics doesn't take into account relativistic effects. It is not true that the simplest solution is the most likely to be true. The point of simpler models is to fit better into our (perhaps prejudiced) world view, and to be able to be explained to a lay or more naive public.