Objections
The fact that these theories seek to extend the formalism is considered as violation of the principle of parsimony by some.
The fact that the collapse process, treated realistically is apparently superluminal and non-local is also considered a problem.
GRW collapse theories have unique problems. In order to keep these theories from violating the principle of the conservation of energy, the mathematics requires that any collapse be incomplete. Almost all of the wave function is contained at the one measurable (and measured) value, but there are one or more small "tails" where the function should intuitively equal zero but mathematically does not. It is not clear how to interpret these "tails." They might mean that a small bit of matter has collapsed elsewhere than the measurement indicates, that with very low probability an object might "jump" from one collapsed state to another, or something else entirely. All of these options seem counterintuitive.
Read more about this topic: Objective Collapse Theory
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