Interesting comment they have towards the end about "targeted memory reactivation can disrupt sleep".

It is important to note the study they are referring to is "targeted memory reactivation with sleep disruption", there are methods of doing targeted memory reactivation without sleep disruption.

I work in neurotech/sleeptech as the founder of affectablesleep.com, and though we are mostly focused on slow-wave (deep) sleep, we have been looking into memory reactivation, lucid dreaming and other stimulations for additions.