Agreed on the "benefit" of ranging with reticle being obviated by rangefinders - the rangefinder is always option 1 for me (the 4ft 300yds was just random numbers for an example). But I've often heard/read that the FFP reticle can more readily be used for ranging, and I was offering a counterpoint to that. The mental math with a "ranging reticle" SFP scope is much easier than any FFP ranging math, at least it seems that way to me.
All mental math for shooting could be argued to be unnecessary these days, but we still practice/use wind brackets and basic ranging techniques. I think it increases awareness of how wind impacts trajectory to do this math, rather than always trusting the black box.
As far as using the ruler, I think it works fine for my scope for example if you just set your zoom intentionally for that purpose. I agree it's irrelevant if you're staying in angle increments the whole time, but it does become more difficult (for me) to work in MILs if you ever want to convert into "length on target" units.
I've seen other failures with illuminated reticles, like the button doesn't work, or the setting is way off either too dark or too bright. And the dark/close shot is not long range, but it is related because a reticle that works at long range/high zoom is compromised at short range/low zoom. I have seen a couple reticles that are ok, usually on very expensive scopes, but to me they still aren't as good as an SFP at low zoom. I would like to see some examples of good FFP low power reticles - I can search around here too.