This is by no means substantially limited, how can the $ exchange rate slowly depreciate year after year? You also can't compare all existing cryptocurrencies with just dollars, in fact all countries have their own fiat with (again) unlimited printable amounts.
When the dollar's depreciation rate is too slow, perhaps the issuing company will create another Xfiat-pegged stablecoin. On the other hand, if fiat can really be set limited then the law of supply and demand applies in the crypto market. Banks don't have to print more.