What is the rationale behind deprecating the ShopifyQL API?

It seems like Shopify is wanting to increase usage of ShopifyQL since it’s not available on plans lower than Plus.

I have to imagine most of the work/expense goes into the data indexing and reporting layer itself, and it seems the API is already in place.

Would be curious to know what the thinking is here. Is it just that Shopify wants to keep merchants inside of their own reporting interface?