Feature description

Optimizer SSR is currently disabled by default when WP_DEBUG is enabled:

It seems more sites have WP_DEBUG enabled in production than I expected, so this is causing SSR to be disabled on sites when it doesn't need to be. Also, the decision to use WP_DEBUG as a signal to turn off SSR was not set in stone and I've wavered as to whether it should be used (and perhaps is_user_logged_in() would be better signal). In any case, we can just default to having it enabled always.

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Acceptance criteria

Implementation brief

QA testing instructions

Demo

Changelog entry