Not many, a couple thousand maybe.
I am not sure the point behind asking. Maybe you are wondering if I am prematurely stating the fix? I found the wear, I replaced the worn part...fixed!

It took about 80-90K miles for it to start shaking in the first place so I don't know why it wouldn't be a long long time before it comes back...
...
YES, ME! Don't you guys believe me?
Marcus, its been a frustrating road, so I definitely want to fix this for good. As it is, I'll be taking my car in for the second time regarding this issue...and I don't work on my TSX regularly nor am I in any business related to autos, so I need my fix to at least as permanent as can be.
So, there is no implication of disbelief from me. Just a concerned TSX owner like you (though without the expertise). Like I said, thank you for your work on this. I hope that point is not missed.
I even went so far as to send your link on to my local mechanic here in Walnut, who's shared with me that this issue not only pervades our TSX but Civics and Accords as well. He thinks the axle design from the early '00s as a whole is flawed, but Honda/Acura hasn't done anything about it. I hope sharing the tech article at least sheds some light on the trend he's been seeing.
Again, thanks for the solution. Didn't mean to offend with the question, not here to disprove anything.
EDIT: to add to the body of knowledge, mine didn't wear out until 80-90k either. So at least regarding that, there are at least 2 of us that can vouch for this part lasting that long (and I'm sure there are more). Replacing it now for me would last the lifetime of the vehicle.