Anyway, WTF, economics communication has a huge problem. I've seen the article's explanation repeated in plenty of places, it's completely wrong and borderline nonsense.
The reason deflation is bad is not because it makes people postpone buying things. It's because some prices, like salaries or rent just refuse to go down. That causes rationing of those things.
The reverse of this is that high inflation tends to cause a lot of strikes, because salaries refuse to go up and very high levels of inflation need salary repricing every month or even week.
It got old really quick having to negotiate with the boss every 6 months.
This is basically what a bunch of people did during and following the Great Depression. Deflation was continuing and the money they had lent to the banks was being written off in bank defaults. And so an entire generation learned to just stick it under the mattress (or stick it in T bills, which reliably didn't default).
Also, it's not just a literal increase of money that causes inflation, an increase in money velocity also increases inflation. Debt write-offs decrease velocity, while debt issuance increases velocity. IANAE.
a common argument, but one that doesn't bear out in the absence of regulation enforcing that.