Tom Bukovac, a.k.a. "Uncle Larry" (https://www.youtube.com/@501chorusecho) has posted a couple of recent videos expressing an opinion on real amps vs digital amp modelers. He says they're about 50% there and mentions high-end artifacts, fizz, lack of clean thump, and the issues with multi-tracking digital modelers accentuating the issues.
These comments are boilerplate canned comments that all anti- digital guys use to justify their bias. You see the exact same comments on forums all the time.
Most of its unfounded but keep in mind there are a bunch of cheap crappy modelers out there that don't help matters.
I have designed and built over 400 vacuum tube amplifiers, and Fractal knows how to model them. It's very obvious that the Fractal engineers understand them too. All the deep dive settings, etc. I know exactly what those settings and what they affect Tone wise on a real amp. And the behavior is dead on.
Most people's negative opinions are on consumer grade so called modeling that has been around a while filling up shelves at Guitar Center, and never playing or experiencing good modelers.

sick and tired of self proclaimed critics and what they think, use what you like and play your guitar.