nepharis

ヽ༼ຈل͜ຈ༽ﾉ drink the water ヽ༼ຈل͜ຈ༽ﾉ

The general answer to the above question is, if you are doing vegetarian/vegan correctly, there is no desire to switch back. Rich has a diet that is working really well for him, so why would he change that?

That's a perfectly valid point, but there are subtle differences between what you've stated and, from OP:

Then I experienced many performance advantages - primarily my body's enhanced ability to expeditiously recover in between workouts, avoid over-fatigue and not get sick.

The difference is his implication that the reason for these changes is solely due to his new diet being plant-based, and not other aspects of the dietary changes, or vast health and lifestyle changes that went along with it.

Now, I'm all for people improving their health in whatever way possible! OP has clearly made monstrous strides in that department. However, to say that there are inherent benefits which he experienced which are exclusive to plant-based diets is very non-scientific. In a field (nutrition) which abounds with bad science, pseudo-science, and "bro-science", this type of claim is sensationalist, possibly deceptive, and really just not helpful.