I've seen an eotech on a marker.
I dont see the relevance of dragging paintball players in the mud, I've seen some excellent milsim in paintball and terrible atempts in airsoft.
As far as game dynamics and systems, both even out depending where you play.
For me the instant permanent switch was for 3 reasons :
Operating system is very realistic, gbbr even better
The DIY approche that has made us able to play in unexpected places.
Regarding that last point too, airsoft has less collateral dammage, in some cases, thats a big win for playong in special areas.
Being able to do a movie with em is also a good selling point. I've seen shit loads and some have given life to near hollywood quality.
So there you go, I never looked back.
Certified Level 2 BA Sniper
Si ton épée est trop courte, allonge la d'un pas. ( Proverbe Hongrois )