In New Zealand every few months another bank stops issuing and accepting checks.
When an organization does a lot of business using money orders that's a red flag that it's an organization so in the wrong, so terrible, that it can't trust its employees not to skim cash and look the other way when they see each other skim cash.
It’s really difficult to bank as a poor person. Post offices are everywhere with reasonable fees.
They're just a pain in the ass.
I pay my bills online but I've needed a check for things like government fees where they don't take credit cards (or charge a fee), paying the company who fixed my roof, etc. I've also gotten certified checks for things like a house downpayment.
When the lights go out, when the internet stops, cash, checks, and money orders still work.
My country (NZ) stopped them in 1986.
Considering the number of earthquakes in New Zealand, I'd think that having multiple forms of redundant payment would be a benefit. I've been through enough natural disasters to know that putting all of one's money into one form of payment is a really bad idea.
Modern mobile infrastructure is quite resilient against earthquakes. Towers are backed by generators and mobile phones have batteries. Payment terminals here are often mobile (3g) connected and contain batteries.
Maybe it's fine for NZ, but I have yet to go through a hurricane or tornado where the mobile networks didn't crumble. I've seen and read about blizzards, floods and sandstorms halting communications networks.