Like I said, prostate cancer is a bad model but is an example of how sensitivity can increase under the right conditions.
And yes I have. I stacked ru, dutasteride, finasteride, and enza for a few months during a slump in my health ( high blood pressure, weight gain, etc.). Still felt inflamed and lost ground so I stopped cold turkey. Of course when I stopped I lost even more ground but when I fixed my health back up I was able to maintain with just derma rolling and minoxidil while on a testosterone cycle.
There are other factors that can upregulate AR, not just androgens.
There is also the long term side effects to consider from using these powerful antiandrogens. Ideally, there would be a powerful drug that does not go systemic but there is no such thing yet.
As such I'm more interested in the upcoming wnt focused growth promoters.