Performance testing is a good software development practice. What are you exposing yourself to by skipping the testing stage?
The frontend of Akeneo is a combination of old and new technologies. Which of them are deprecated technologies and which belong to the target technology stack?
If we want our front-end to reach such excellent results we need tools which usually occur in the form of dependencies like node_modules (a lot of dependencies).
Progressive Web Apps are definitely a hot topic these days. We released a library and product that will make Enterprise websites run smoothly as PWA applications. Headless TYPO3 & PWA open source solution is ready.