@Kim *********
thanks. This link says exactly how I described it. 180 days in a year, that can be extended an additional 180 days. Not 180 days spaced out over 5 years.
"5-year multiple-entry visa and the right to stay in Thailand for a total of 180 days a year, with an option to extend for another 180 days. "
So, in theory, it can be 360 days in a year and therefore ~1800 days over 5 years.
Thanks for sharing the link that proved my point. Now let's see start the details are if they actually create this visa.