I should have said adequate data processing agreements which comply with the GDPR. In practice the simplest way to do this would have third parties handling EU

I should have said adequate data processing agreements which comply with the GDPR. In practice the simplest way to do this would have third parties handling EU requests within EU boundaries, and not shipping analytics that contain PII outside controlled boundaries. Some service providers appear to at least be addressing the issue, e.g. see the AWS link. Hetzner in Germany offers similar data processing agreements. It would not be difficult for Cloudflare and Google to do the same. If you operate a CDN, almost by definition you have no problem hosting within the EU when sending content to users in the EU.