Well when i record i love the frfr thing...thats what i do since almost 2 years now. But when i play in a club or rehearse in a room where you hear all instruments also in their natural way, frfr sounds odd to me...again it all changes when i am in a big venue and on a huge stage, than the cab sound isnt that important anymore.
But in other cases, cab is for me the real thing, micing it up, micing drums up, micing saxophone, trumpet, vocals, acoustic guitar etc....its a compromise.
It never sounds to me as good as the natural, acoustic sound....ofcourse there are artistic ways, sounds you can create but we are not talking about this now. So the cab is the way i started listening, playing an electric guitar....means thats the most natural way it sounds to me.....but things can change, years might pass and i might get more used to frfr and i am sure there will be better IRs, speakers and all...thats how i feel by now.
I cant tell you what exactly it is, but cab is for me much more ear friendly, more beautiful sounding than IRs...or better than miced up cab sound through PA...
Can you put your finger on what it is that keeps you wanting to go back to real cabs instead of frfr? Is there a specific thing you are able to focus on like lack of low end, sterile-sounding, etc. that separates the two? I love the convenience of being able to take advantage of the cab sims but seems like real cabs have s certain thump that sounds better in some situations.
When I'm playing thru my computer via USB, the cab sims sound absolutely awesome. I think most would agree that it gets tougher to find a perfect solution for live use.