Your story on why Abe, the sausage king of Chicago, rejected TR. Perhaps thats not the reason.
My story is pretty simple, one summary I posted here
For 2 year periods, I’ve trained harder than TR, and easier than TR.
Not showing the TR 2019 year because I was injured, went on long trip to Europe, and it makes TR look worse.
Got faster before and after, pretty much any metric (ftp, max power, estimated vo2max, pretty much the entire power curve / power at 5-sec, 30-sec 1-min, 3-min, 10-min, 20-min, 1 hour, 3 hours, etc)
For myself it was pretty simple “something isn’t working as well as it should, time to try something different.”
Don’t get me wrong, I got gains on TR coming off an off-season. But never as high as when I did crazy hard training, or crazy easy ‘it ain’t polarized’ training. 
Not a knock on TR, I expected more gains and for some reason it didn’t work. Not everybody responds the same to training.