I'm not sure where you got the idea that I said 1103 did not resist PD, I stated that vines grafted to it will show symptoms of an infection based on the research I have found. If 1103 indeed passes the PD resistance to vines grafted to it reliably, I'm not sure why 1103 is not used extensively by vineyards that have PD issues such as the one cited in the article from UC Davis about one of the vineyards that tested the new PD resistant releases. If the problem could be solved by a single rootstock, I'm not sure why Andy Walker would have persisted with his research to develop new varieties specifically for their PD resistance.
Quote from the UC Davis article:
I can only make statements based on what research has been completed and the results being published. This happens to be a very important issue for me and my location and I have not been able to find anything that will allow the cultivation of Vinifera until these new Andy Walker varieties were released.
Here is some heavy reading if you are up to it from the 2021 Pierce’s Disease Research Symposium in California last year. I do know research is being done with 1103 and Chardonnay but that research is still being conducted.
This PDF is 373 pages long so I'm not sure if I would try to open it in a mobile device.
Link:
https://www.cdfa.ca.gov/pdcp/Documents/Proceedings/2021_pd_symposium_proceedings_final.pdf
Regarding the 5 new varieties of PD resistant vines released by Andy Walker, where is your disagreement there? That is wildly known to be a fact and those varieties are now being commercially produced.