Prolia is certainly impressive if you ignore the side effects and the potentially devastating rebound fractures that happen to some. I think Dr. McCormick offers a strategy of
1. a bone building med,
2. short term Prolia (2-4 doses),
3. following the Prolia with Reclast.
All the while following bone markers in order to avoid a sudden increase in bone breakdown if and when you stop the Prolia. And he warns if you go beyond about 3 doses (if my memory is correct) you have more risk of getting the rebound effect.
I'm thinking about this but it sure makes life more complicated and Prolia's rebound effect is just plain scary to me even with the strategy of following Prolia with Reclast.

Here's an interesting paper comparing Prolia to all the bio-phosphonates. It has charts showing the bone density changes year by year for each where the info is available. Prolia keeps increasing density for 8 years in some studies but there is a drop off at some bone sites around 3 years. The bio-phosphonates usually stop improving your bone after 2 years. All this shown in charts. So, Prolia totally wins in the bone gains department. But the paper doesn't do a through job on the negatives.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4426099/