I have several polymer guns, and there will be many more because that is the trend. But trends change, and someone will invent a better way of doing things just like they have thru history. 30 years ago "and more" no one knew what a polymer gun was. I know someone will argue about it as they always do, but back in the 70's you probably carried a revolver if you carried a gun for protection, And just as that evolved to this, so will this evolve to something else.
But as far as triggers go, how much more do you expect from a lever? It is pulled and a spring is released or tightened up and released here and there and a bullet comes out. It's simple mechanics, and until someone designs a digital way of accomplishing the same thing, this is what we have.
Technology will at some time replace mechanics. It has done so with just about everything we use and will ultimately do the same with firearms.
There will probably be a time in some of our lifetimes where you will be able to program your gun with your phone, adjusting all of the parameters simply by dialing them in with your cell phone. Think that is far out? wait and see in 10 years. I remember when people "including myself thought you needed a 18" woofer and 2, 8 inch midrange along with a couple tweeters to get the same sound you get now from a small digital sound system you can fit in your pocket, same goes with everything form computer controlled vehicle's we drive to the actual computers themselves. Everything must change and evolve as we go forward and learn more. Just think of how the new vehicles can alter everything from the ride and power to the steering with the push of a button. I can change my air/fuel mixture without opening the hood, things are evolving. Imagine if someone would have told us in the 60's that there would be no more carburetors, and 4 cylinder engines cold produce 400+ horsepower.