The regional Google Fonts ruling was an odd one. It had to do with Google processing the IP address, not whether the website was loading from any external domain at all. It did appear to be based on the court's misunderstanding of an IP address contacting a server to be data processing, and perhaps we're going in that direction, and won't be able to use even an extremely privacy-focused CDN without a formal data processing agreement, but that is not currently the intent of GDPR.

The advantage of a service like Simple Analytics remains; it does not store or process any user data.