[xemdetia]

How is using a standard path 'just for sysadmins' again? You are introducing something new today.

[tsazan]

Try uploading a file to /.well-known/ on Shopify or Wix. You cannot. Their file managers block hidden directories (starting with a dot). To do it, you need a custom app, a meta-field hack, or a reverse proxy. That is sysadmin work. Uploading a file to the root is user work. That is the difference.

[reddalo]

So the solution is that both Shopify and Wix should let the user edit those files. That's it.