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> Our future plans include letting you save a secure backup archive to the location of your choosing, [...]

I also missed this on my first skim of the article though.

Several points discussed in these comments are addressed by the author in the linked https://bugs.ruby-lang.org/issues/19420

sambostockon Ask HN: Real-world anecdotes of MySQL at scale?

Shopify Engineering has blog posts you may find interesting:

https://www.google.com/search?q=mysql+site%3Ashopify.enginee...

sambostockon The accidental genius of Yo

Years ago, I hooked up my apartment buzzer to Yo with a raspberry pi. https://github.com/sambostock/yoorbell It was super insecure, but if you yo'd it, it would let you in, and if someone buzzed the buzzer, it would yo me. Exactly as much info as needed.