My $.02....SFP is more then adequate for hunting and most other applications.
The way I look at is this....when I'm stillhunting/stalking,or even on stand,my scope is ALWAYS cranked down to lowest magnification.Obvious advantage of quick target acquisition for any close range shots that present themselves.Most cartridges that I or anybody else on this forum will be shooting require very little if any holdover out to 300y.....hold on hair/not air....dialling in for a precise MOA shot isn't necessary at that range,you have a 12" minimum vital area target to hit.
That said....any shot that presents itself at a distance of 300y and beyond,or even beyond 100y(?)....99% of the time there's plenty of time with unaware game to crank up the magnification,typically to the highest level where the SFP reticle is calibrated for and becomes useful as intended.
In 30+ years of hunting,mostly with 3-9x optics,I can't recall a single situation or shot where I've elected to use the midrange mag levels(5x,6x,7x etc).....it's ALWAYS either cranked full down to 3x or full up to 9x....never in between.
So that said.....the whole concept that SFP is some sort of disadvantage because it only works at full power is nonsense IMHO,because any shot that I'll be taking at distance, the scope is gonna be cranked to max magnification anyhow,and anything closer doesn't require any kind of holdover.