Every scope I own is a FFP except on my 10/22 squirrel rifles. That is more to the point of the scopes are not as expensive, but still good glass.
As far as "can't see a FFP reticle on low power in low light", it depends on the reticle design. If it has heavy outer stadia, it is just like a fine duplex SFP reticle. Easily visible to my 48 year old eyes. If you are hunting on low power, you are more than likely hunting close and/or at moving targets. Plus, let's be honest, if you are hunting on 3x, you are probably hunting under 150 yards or even closer. You bracket the heavy outer stadia on a vital zone, not shoot for an individual hair on the shoulder.
As for "the reticle gets too thick on max power", the reticle covers no more on 25x than it does on 5x. A .1MIL line covers .36" on 3x or 24x. The target grows with the reticle. The same .5" target dot is the same at 3x or 25x too. And if you are shooting at deer sized game at 1000, the same .1MIL line covers 3.6" in width of the game animal, again, at 15x or 25x. A .25MOA line on a SFP scope will cover 2.5" @ 1000 yards on whatever magnification setting it is true at. Usually max mag, but not always. But on half power, that same reticle line now covers 5" @ 1000.
FFP subtensions are always constant. Awesome for wind holds, and you don't have to be on max magnification so you can get a wider FOV.
FFP scopes USUALLY have much better reticles available, and most true top tier optics are FFP. There are certain models available by some that are SFP, but not nearly many.
FFP scopes are usually heavier, and more expensive however. But again, most top tier makers build FFP scopes. That goes without saying on why a lot of the FFP price tags are higher.
Unless you use your reticle subtensions for wind holds, and even holdovers, a FFP is not really needed. No use getting a duplex in a FFP scope, as that totally defeats the purpose of FFP.
For me, it is a no brainer in a LR hunting scope. I rarely hunt, even long range, with a scope set to max power. To be honest, my longest shot on game to date (1365 on a pair of coyotes), was on 17x in my 5-25×56 Premier. I did, however, hold 2.2MILs wind hold for two 1st rounds hits and two deer killers eliminated. The 17x allowed me a wider FOV to watch coyote #2 trot off after the first coyote dumped. Then, adjust over and take advantage of the dumb one that stopped about 40' to the right. Again, with a 2.2 MIL wind hold.
To each his own. I will not ever own another SFP scope on a hunting rifle. Too many advantages in FFP for me. Not enough disadvantages in my opinion.