I agree totally that to each his own. If a Mac is the only line to pure Jerry tone YET "most of Jerry's sound was in his fingers" than what's up? Ultimately the Equipment combinations that fuel your muse as a musician and performer are what's right and right only for you.
Portability and reliability have always been high on the list of requirements for practicing artists. If heavy racks of gear are the only way to reach a minimum standard of sound than so be it. But if you can get satisfactory sound from something less than great. I hate it when my backs hurting before the show even starts!! I personally use a Fender Jazzmaster ultralight and a 212 Weber Neo Cab and they sound great. Not as clean as Jerry but just fine and plenty loud. I have other equipment that I bring out for outside and all day stuff where it's more worth it to lug it all.
All equipment sounds unique unto itself including the Macs. The ear can hear unmeasurable differences in sound so no two combinations of equipment will ever sound the same. Don't waist your time once you've reached an 80%-90% satisfaction with chasing the Jerry tone unless your doing it just for the love of it ( I do ). That last little bit is pretty unattainable except by luck. And of course there's the sound built into Jerry's playing style, The 'it's in his fingers' factor.
The only monkey wrench in my theory is what I've been hearing from what Shakedown's Amp mods. They seem to sound bang on. Right amount of hair and just well, exactly the sound I want to hear in an 80's Jerry tone. Eventually I'm going to have him rework and old Super 6 Reverb that is resting at my folks house.
When the secrets all are told,
And the petals all unfold.