I think there's always been monks meditating following the vinaya strictly in forests. They may not have a marketing department.

However that sort of question " isn’t it the case that Theravadan meditation practice went practically extinct" is a very theravada move as the "way (vada) of the elders (thera)" it always asks "is this modern buddhism really what the buddha taught" and that characteristic emphasis at the center distinguishes it from the mahayana