That's cool, Ian. You found ways to work that worked for you.
In the past APX 100 and 25 was all I used, together with Rodinal. Then came 200 rolls of TMax 100 into my life, and I used that with Rodinal too. I totally agree that those two films in Rodinal were just super. I love printing those negatives.
With that said, I happily use that developer with the films you recommend against using, but not to rebel against your obvious intelligence, but rather because I just love the results so darned much.
I maintain that I think Rodinal is a developer that adds a little bit of texture to my photographs, while Xtol yields smoother shifts in tone. That's how it works for me, particularly with TMax 400 which is my most used emulsion. Xtol holds back highlights some, and is to me the perfect developer for when light hits the subject directly. Rodinal continues in a straight line unless we slow agitation to every 3 minutes or every 5 minutes (which is a very useful trick), while Xtol shoulders off more.
The shadow detail department - I don't know what to say, Ian, other than I get at least a half stop more shadow speed with Xtol than I do Rodinal. Especially at 1:1.
I think I will just agree to disagree here, if that's OK. I know what I see, but I also don't discount any of your findings, because you have lots more experience than I do, and I really do respect your knowledge and opinion. But I also know what I see with my own two eyes.