I keep a 64 Custom Deluxe Reverb (which is awesome amp) nearby my desk on an amp stand right beside my Powercab212.
There is something going on with older amps.. not all of them, but a limited few. If you have been lucky enough to happen upon one, play one or better own one.. I have an original 66 JTM45. And yes it’s sublime. Sounds different to the JTM in the Axe and if I’m brutally honest - sounds different and FEEL’S different to all the other JTM45s I’ve played including, vintage and within 1 year of manufacturing dates.
Do I think the axe FX II could model it..? I could never get close to both tone and feel in the same preset.. meaning, If I dialed the tone closer, then I lost feel... Then if I dialed the amp to where the feel was close, then the tone was miles off.
The Axe III on the other hand is much better at giving you both feel and tone at the same time.
So, Do I think the Axe III can a have feel and tone of any given amp? - Yes, in a nutshell.... But you have to keep in mind, the amps or amp which has been modeled and exist in the Axe III today, may not have been the holy grail amp of the one YOU want/like.....
In other words - I Would maybe like to have Fractal go to several vintage and rare amp stores, try and pick the best of the best, (I do believe you know you have a gem when you know it) model it, and put them in the Axe....Then again, maybe this has already been done?