As much as they're supposed to respond and sound like traditional amps, it's still a different paradigm to learn. Some of us have spent a few decades with tube amps, pedals, and cabs. What we think we know about setting things up and dialing things in may not apply, and in some cases, our pre-conceptions handicap us. FRFR isn't going to sound like a cranked amp in the room, because it's not suppose to. I prefer a flat amp into a traditional guitar cab.
10 years ago I would have said the technology just wasn't there yet. Now I think it's more a matter of having the capacity and willingness to learn it. For younger people, it'll be as second nature as amps and pedals are to us. People think they have golden ears when it comes to the preference for tube amps, but sometimes it just sounds like they want to justify their choices. It's the guitar version of your grandpa not wanting to learn a smart phone or computer. Sure gramps, your flip phone is the real deal. There are plenty of guys playing real tube amps who sound like shit. It's not the technology, it's having the ability to dial it in.
Use what you like. I use some of both. I guess I've never felt like I needed to validate my choices by manufacturing fault with the alternatives. It starts sounding like truck owners who aren't secure enough about what they chose without trashing the competition.