So a player works at six different spots on defense and is going to be a major piece of the Cardinals' defense and ... he isn't Isaiah Simmons.
Instead, it's Budda Baker, and perhaps it gives a little insight that a) Simmons can indeed be that Swiss Army knife even if he "focuses" on inside linebacker and b) Vance Joseph does have an idea how to move a player around.
A recent article on NFL.com noted that Baker played 647 snaps at safety in 2019, 174 at outside linebacker, 155 as a slot corner, 39 at inside linebacker, 31 as an edge defender, and 22 at outside corner. That feels very Simmons-esque, at least in the context of versatility (I'd guess Budda, Pro Bowler that he is, might actually want it to be said that the rookie might actually be Baker-esque rather than the other way around.)
With a player like Simmons, Baker might actually be moved around a little less -- sometimes those snaps at inside linebacker and slot corner were to allow Baker to match up with a tight end, which figures to become more of the domain of Simmons and/or fellow inside linebacker De'Vondre Campbell, although Baker mostly found himself in those spots blitzing or getting an inside receiver. That may or may not be something Simmons does a lot, at least early on.
You can't deny Baker's versatility, nor that of Simmons, and again, that's one of the areas everyone will be watch how Joseph deploys in 2020.