Agreed. But not because of what you are implying: "...people transfer their savings to cash, the world switches from producing real stuff...". That is rather a risk resulting from deflation.
I agree because higher inflation can help an economy plagued with insolvent debt to "assimilate" it gradually and create new room for healthy debt.
> Not true, inflation means that revenues are constantly rising faster.
That's precisely what I'm denying: there's often a significant delay between the outflows of money and the inflows they generate (typically in high fixed-costs businesses).
If you're expanding production every year and you see the added revenue only the year after it's not difficult to see how inflation would have a negative impact (even if constant!).