Well digital modeling will eventually replace tube amps when the tubes are gone, but it will never replicate it. There is saying " you can't simulate reality"
Yes it is true it is hard to tell the difference in a recording, recordings are all 100% digital today anyways, so in the studio they are extremely usefull when a producer wants to dial up a tone ASAP and get to work.
Modelers are great for "simulating" guitar tones and amps. Just like simulated leather and sweeteners, they are similar, but not the real thing. Every year for the past 25 years, new device or software upgrade is suposed to make all the diference, and then to the next 20 years with new devices and software upgrades are supposed to make the difference. and we will still be here debating it.
Modelers can't act, react and sound 100% exactly like a real tube amp, because they are not a tube amp. But they can give you arppoximations for many usefull applications.