USP has announced on their page that they will be delaying the implementation of USP<800>. This revised date is December 1, 2019. Along with the new date to become compliant with the USP<800> regulations, this date is also the projected completion of the USP<797> revisions.
I believe this is going to give a lot of compounding facilities relief in the pharmacy sector. Being cohesive on the two mandates will allow facilities to properly complete the necessary renovations or new build to ensure compliance.
For a perspective from a pharmacist-check out this link: