When I started learning about firearms in my teens, I was convinced the AR was the most despicable firearm ever forced on the American military. I mean, I knew my calibers, and .22......? Really? The baddest military in the world is using a .22 caliber rifle? Really? On top of that it used the direct impingement design, one that fouls where it eats, no way! Not for me
Then I learned that is was basically forced down their throats by bureaucrats who could explain the theory of relativity in their sleep but couldn't tie their own shoes or change a light bulb.
I avoided the AR like the plague, wouldn't touch one or even had the slightest interest in one, my favored platforms were the AK and Garand (aka Garand, M1A, Mini-30). But as I felt it necessary for the larger cartridges to be scoped to get the most out of them I quickly discovered that those rifles didn't make it easy, and the AK simply is not optic friendly in my personal experience.
Then along came the 6.8spc, now this was a REAL caliber, but initially only available in AR platforms and later the Mini-14. But the accuracy issues and Ruger sticking to the initial SAAMI specs turned me away from the Mini's. But there was still hope, I could get my hands on a 6.8 AR with the "more reliable, cooler, cleaner" piston set up, but wait, $500 more for that? Hard to justify.
So I dove into the DI AR history and studied it's design and history and decided that I could give it a chance.....but only in 6.8.
I bought an RRA Mid-Length and swapped the barrel out with an ARP and I must say that this is now my favorite rifle.....EVER. It has not malf'd at all since I've bought it. It is accurate and packs a much bigger punch than the .223.
I haven't found it to be excessively dirty either, even after extended range trips. The A4 flattops make it simple to mount scopes or other optics on it, it is relatively light and ergo-friendly and infinitely modifiable.
But, as much as I don't like the .223, I felt compelled to consider one after observing our current ant-gun atmosphere. My feelings were that there would be more .223 available after a "crisis" than 6.8 and that the .223 would be easier for my female family members to lug around and operate than my 6.8 or other rifles that I owned.
So I purchased a DPMS Lite and have been pleasantly surprised with it, it has a 1:9 twist and prefers 55gr. ammo over all others. So here we are, after all this, I have become an AR convert and frankly quite thoroughly satisfied.