Initially I was really interested in your article. I still am very interested in where this part of the industry is going. However, here in California the push for heat pumps is really high. I'm not a writer so I'll sum up my views.
The beginning of your article said it best. Just backwards. "A heat pump system does double duty". Essentially using the compressor all year long in addition maybe using heat strips in the winter. This equates to alot of cost for the homeowner. My recommendation to most is , keep your natural gas system. Although the environmental impact may or not be a factor, natural gas is not going anywhere. New is better of course. More efficient. Hotter temp , faster, in the winter. If solar exists, then an electric heat pump system may be good. Variables must be considered. Namely cost.
In California though, it's sad because supposedly we don't have enough energy to go around every summer. Yet they push electric systems. Likely a money grab.