Au contraire, I am seeking precisely theories that actually modify existing frameworks without merely begging the question. The approach of "oh, must just be mo

Au contraire, I am seeking precisely theories that actually modify existing frameworks without merely begging the question. The approach of "oh, must just be more matter but it's weird that we can't see it" is going to be seen as ether or geocentrism is now. It's just grossly unimaginative and ironically doesn't actually modify existing modes of thinking, i.e., assumes that gravity is still a fundamental force if only we could describe it as a quantum field. MOND is a change to the existing framework that makes predictions from the basis of a theory that actually explains the data "discrepancies" we're seeing vs typical assumptions. The discrepancies are testable with MOND. It's not merely a post-hoc justification of some detailed maps of where matter "isn't". While with dark matter all one can try to do is detect particles that we are already blindly assuming are there. Dark matter enthusiasts love to espouse the "shoulders of giants" thing with their tiny incremental modification to LCDM but they're taking an approach that fails to learn from the historical blunders of physicists before who wanted to assume some substance exists and then try to back-prove its existence with increasingly elaborate and specialized theories of origin.