During the course of this 24 hour trial period we ended up blocking just under 513k HTTP requests against our various gradle.org domains which is ~1.2% of our traffic. During this time we did see a decrease in the number of requests using HTTP instead HTTPS.
Gradle has also officially dropped support for TLSv1.0 across all of our domains. TLSv1.3 was enabled yesterday but due to a race condition bug the TLSv1.3 logic in early versions of JDK 11 and JDK 12 we have decided to turn off TLSv1.3 support for the time being.
https://bugs.openjdk.java.net/browse/JDK-8213202
Overall, we believe this test was a success and plan on moving forward with the planned decommission of HTTP on January 15th, 2020.