While there is no single "official" narrative story, the history of Adobe After Effects CC 2017 (Version 14.2.1)
"You are the third one to install this build. The first two kept rendering. They are still rendering. They are beautiful. They are extra quality." adobe after effects cc 2017 1421 extra quality
It looks like you’re referencing a specific version of Adobe After Effects CC 2017 (version 14.2.1) While there is no single "official" narrative story,
The 14.2.1 update specifically addressed several critical stability issues that plagued earlier 2017 builds: adobe after effects cc 2017 1421 extra quality