This has been turned on for about a year and a half now and removing it helps simplify the pass structure (though not a lot).
I didn't see much of a review either way so I don't even know if people care or want it on by default as this is literally the only place that has it on by default and it appears to have been used for GVN Hoist which is still off by default.
Thoughts? Conditionalize it on GVN Hoist? Something else?