Not to sound like an old fuddy-duddy, but at some point the line will not be held and we'll have to "endure" mere linear growth (this being a finite planet and all).
Or no growth from lack of business adoption. The deflationary aspect is actually not positive in that regard. Gresham's law forces any type of deflationary - or even 'less inflationary' - instrument out of circulation and out of adoption for use.
Take the following real world business example: Rick from "Pawn Stars". People bring in junk and sell it to this guy's pawn shop. So let's pretend that the US dollar was deflationary and he gives you $100 for something and a year later that $100 is worth $110 instead. This is why Gresham's law exists. His natural goal is to pay you, or unload onto you, the worst form of garbage possible as payment, and in that manner from people constantly trying to rid themselves of a liability, it circulates fast with high usage while others don't.
Is there any reason for Rick from Pawn Stars to pay people with bitcoin? As per the example above, no. Is there any reason for Rick from Pawn Stars to accept bitcoin at all? Not really, due to the fact supporting it is just adding a bunch of overhead to himself with no real benefit since few if anyone is going to pay him with it for the same reason he's not going to pay anyone else with it. In that manner, using or supporting bitcoin as either a vendor or customer is somewhere between detrimental to pointless from an economics perspective, and is really nothing more than a political statement.
This means the only use case of a deflationary instrument is a seldom used, low velocity, settlement system (store of value). In other words, the only real world use case of bitcoin is a direct competitor to gold and silver, but bitcoin fails miserably at that task due to not removing middlemen or counterparty risk (it has built-in middlemen), being susceptible to infinite amounts of black swans that can take it to zero while you need a black hole to hit the earth to destroy metals, having no valid Schelling point, no real scarcity (artificial scarcity is not scarcity), etc.
