P,
You would think that would be the case, but I've noticed that 64 bit, when checked, does weird things with exporting as well. It seems to be related to my soundcard in some way or another, but I can't put my finger on it. At higher latencies, (256 and up)  it seems to be a little less likely to  hang up on me, but that is no where near a hard and fast rule. Sometimes it will become erratic at less or more. Anyway, unchecking it almost always seems to help, so regardless of whether there is a benefit to it or not, I have found that a working audio file almost always beats silence.
But I think it is definitely something that they should just make right, or stop talking about it altogether.
"our 64 bit, double precision engine never has worked correctly for a significant number of users, but you may find it a usable feature, even though it is debatable that it even has an audible advantage" doesn't sound as good as a feature on their advertising.

I agree they need to sort it out, not sure if it is an illusion but my ears can hear a differnece especially on effects tails etc similar to the difference between 44.2k and 96K.

P-Theory
I agree they need to sort it out, not sure if it is an illusion but my ears can hear a differnece especially on effects tails etc similar to the difference between 44.2k and 96K.

Yep.

DP

ampfixer
Just shut it off and leave it. There are a few power users that keep it turned off and they don't seem to be missing anything. My needs are very simple but I don't use that option because at one time it was suspected of causing instability for some systems. Haven't bothered with it since X1.

After several years of deliberation, I came to the conclusion that I really can't tell the difference. There might be some use cases that I don't encounter where it would matter, though I can't quite imagine what they would be.
 
I can't tell the difference so profoundly, in fact, I have absolutely no idea what it's currently set to.

Right, just checked. I currently have it switched off for both playback and export.
 
I'm tempted to do one of my occasional experiments with turning it back on, but I've really never noticed any difference.