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I still don’t really believe in dark matter. Very sketchy stuff. And unsatisfying.
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Astronomers have previously detected dark matter clumps around large- and medium-sized galaxies. Now, using Hubble and a new observing technique, astronomers have found that dark matter forms much smaller clumps than previously known buff.ly/2R7KUcy
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Except Neptune distortions didn't require assumption of exotic types of matter, just an undetected lump of regular matter, so the analogy doesn't quite work. It's not a limitation of instruments or observations. It's an ontological limitation of theory.
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"gravity" itself has undergone 2 redefinitions that completely altered its ontological character. It was a "force" under Newton, a space-time curvature effect under Einstein, and now a "wave-particle" under quantum gravity type theories. So the word doesn't matter much.
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I'm not sure what you're arguing about tbh. There are observations that admit certain unsatisfactory descriptions under current models. It is okay to call unsatisfactory things unsatisfactory as far as I'm concerned.
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