Some thoughts occur:
If he was using Fractal into real amps recently, then probably in order to keep effects chains/ presets working him and his guitar tech have not touched the fractals or his rack switching routing, and replaced the real amps with the amp sims. Easier than re-working every Axefx preset to include the amp sims in their various blends as well.
It's also probable that front of house uses their own presets to blend the various amp signals, since different songs use different combinations and blends of AC30s and Tweeds. Again, just changing the amps for pedals means all front of house needs to do is replace mics for line inputs.
Also, when they were trying it out it was probably quicker and easier to have amp replacements with one knob per function controls, no menu diving needed.
IIRC the last time the Edge had his amps on stage for a tour was about 15 years ago. Once the amps are off stage and you're only hearing them through mics and monitors, it's less of a big deal if they're big wooden boxes or little metal ones.
