No, smart guy, it comes from using tons of different gear with my band over the years and us ending up sounding basically the same everywhere we go no matter what we use. It also comes from me letting others use my gear and them sounding almost exactly like they always do.
Come on, this is totally disingenuous and you know it. If someone plays a P through a B15 they're going to sound wildly different than playing an alembic through an SWR biamp rig from the 90s. Sure, you can roll off the highs on the SWR and maybe get "in the neighborhood" of a tone useful for emulating the B15, but the reverse is not true, you will never get that big bright piano tone from the "old school" setup, and no amount of "finger" is going to change that. And that's if you have Stanley, Marcus, or whoever trying. Style wise they will still sound like themselves, surely, but tone wise it will be wildly different and the "90s" rig will be much closer to the normal sound.
I mean, if gear didn't matter, we'd all just be playing squiers through behringer ultrabass combos. But what do you play? SVTs and B15s? Expensive amps with a fairly specific sound. You must play those for a reason. You're a freakin ampeg endorser for crissake.