It is almost always the case that when progress stops for some meaningful period of time that a parochial taboo would need violating to move forwards.
The best known example is the pre- and post-Copernican conceptions of our relationship to the sun. But long before and ever since: if you show me physics with its wheels slipping in mud I'll show you a culture not yet ready for a new frame.
We are so very attached to the notions of a unique and continuous identity observed by a physically real consciousness observing an unambiguous arrow of time.
Causality. That's what you give up next.
It's easy to give up existing concepts. It's called being a crackpot and you can find thousands of papers doing that online.
This is a common framing of the Copernican revolution, and it's wrong.
Copernicus was proposing circular orbits with the sun at the center instead of the earth. The Copernican model required more epicycles for accurate predictions than the considerably well-proven Ptolemaic model did, with the earth at the centre.
It wasn't until Kepler came along and proposed elliptical orbits that a heliocentric solar system was obviously a genuine advance on the model, both simpler and more accurate.
There was no taboo being preserved by rejecting Copernicus's model. The thinkers of the day rightfully saw a conceptual shift with no apparent advantage and several additional costs.
the fuck you mean giving up causality?
I'm pretty sure quantum mechanics already forgoes conventional causality. Attosecond interactions take place in such narrow slices of time that the uncertainty principle turns everything into a blur where events can't be described linearly. In other words, the math sometimes requires that effect precedes cause. As far as we can tell, causality and conservation of energy is only preserved on a macroscopic scale. (IANAQP, but I'm going off my recollections of books by people who are.)