Thus many EU countries reduced the maximum note value, reduced allowable amount for buying things in cash, and .se has mostly eliminated cash with everyone using cards.

How does that stop the money from being less valuable?

I'm not discussing inflation here, just the concept of negative interest on bank accounts.

If you had a pile of cash, it would remain a pile of cash. If you had 100,000 euro in the bank that might be 99,000 euro after some time because the bank essentially charges you a storage fee as interest rates are negative. Conversely, the bank would essentially be paying you to take out a loan.

Maybe I'm misunderstanding how it works since it's never happened in the USA, but I think that I have it right. See https://www.investopedia.com/articles/investing/070915/how-n...

Got it. I was confused because the parent to your post suggested people are cool with storing money on the bank with 10% inflation. That makes no sense to me because when you convert it to cash, the inflation still applies.

As for negative interest rates, here in the Netherlands banks didn't dare to go negative, even if conditions would warrant it. Perhaps because it might trigger a bank run.