There was vaporwave, there was synthpop and many more. Then it died around 2010. But there was a spark and it came back alive around 2015, I believe thanked to Mr. Robot's unique soundtrack that featured haunting analog synth. Then Stranger Things. Blade Runner 2049. And after that synthwave suddenly became a thing again.
As for me, I started to implement synthwave into my cinematic work around 2015 with my first track, Anarchy In Order.
What about you?