For the record I agree that a hard cap is better than arbitrary centralized control.

But there are good reasons to be concerned that a permanently deflationary conditions are not optimal for human flourishing.

I don't think it should be at all controversial to say that deflationary conditions restrict spending and capital investment, which doesn't prevent maxis from reeeeing autistically every time it's mentioned.

its not "tends to deflate", it deflates by default if there is ANY economic growth whatsoever. That tendency will limit investment that creates economic growth, it's a self-reinforcing cycle.

I don't think there's any burden of proof on the subject, not only are they plenty of examples, its obvious in the "only 21M ever" hodl mentality of bitcoiners.