Why entire store was converted to JSON files?

Hello, does anyone know why an entire stores liquid theme files would be converted to JSON format? For example myexampleproduct.liquid is now myexampleproduct.JSON in the store. (Refresh 9.0 Theme) I have rarely seen a store with files like this, usually on a 3rd party theme.

It definitely was not like this in the past, and no changes to the theme/store have been made, so not sure what the cause would of been.

It is not a huge deal, but I found it much easier to manage when it was mostly liquid files, since that is what I am most familiar with, I don’t understand the JSON templates nearly as well. The contents of the individual sections must exist somewhere in my store in order to be served on the website, but with the changes in templates I cannot find them. I plan on getting more familiar with JSON but Is there a way to revert the format back on some of these files to be .liquid? Any help or advice would be appreciated. Thanks!

Side note: The store was already a 2.0 store prior to the templates being converted, so I don’t think that is the reason they were converted to JSON.

If anyone has any additional resources for working with JSON in Shopify beyond this that would be very helpful: https://shopify.dev/docs/themes/os20/migration