Back in April we first released an alpha of a brand-new runtime for Construct. This has been completely rewritten from the ground up and brings huge performance...
Great work, Construct 3 is really coming along nicely!
I'd like to do a full switch, if it wasn't for unsupported 3rd party addons. Not a lot of 3rd party addon Dev's seem to have the time or motivation to port their addons to the new c3 (and C2.5) runtime yet unfortunately. Judging based on the recently added features, wouldn't surprise me to see those 3rd party addon features as official features in the near future though.
The only one I'm waiting on is LiteTween. I'm hoping it's updated soon!