Having spent 20+ years managing IT departments in large companies, I'm a bit confused as to why the alert describes an "error", yet you are now stating it's not am error at all, and is simply a best practice recommendation. I run in the top 1% of dom...

That doesn't explain why all of us suddenly suffer from this error.   Perhaps shopify broke something and wants us to make changes to remediate it for them.   I gave you fair warning.  Best of luck.

Also, a wide spread issue like this, should be communicated directly from shopify.   Getting advice from a volunteer helper is not an equitable response regarding all of the concern.    

But that's not actually the case.  All of us were not doing The wrong thing fir years.... Don't mess with your domain until you have sense made out of this. 

Have no fear!  Shopify's "award winning support" will rescue us all!   Lmao.   It's clearly an issue on shopify side.  Some off-shore resource broke something, and the c-levels are too busy on their yachts to care.  Give it a month or two.  They'll f...