Both of these technologies are useless. How bout we start producing more high refresh panels ? It's as simple as that. This whole adaptive sync garbage is exactly that: garbage.
I still have a Sony CPD-G500 which is nearing 20 years old and it still kicks the craps out of every LCD/LED panel I have seen.
Gsync is way overhyped; I can't even tell the difference with my ROG Swift; games definitely do not feel any smoother with Gsync on. I'm willing to bet Freesync is the same way.
Speak for yourself, I invested in the ROG Swift and noticed the difference. This technology allows me to put out higher graphics settings on a single card @ 1440p and while the fps bounces around worse than a Mexican jumping bean, it all looks buttery smooth. Playing AAA games, I'm usually in the 80s, but when the game gets going with explosions and particle effects, it bounces to as low as 40. No stuttering, no screen tearing.