Well done on being punctual! Seems that you made a great timing decision as well as gun. I did not listen to that voice, or listened more closely to that of my wifes, and did not buy the 6920 I want when it was at least 1/2 the price.
Congratulations, You bought the best!!
There is a minor advantage with recoil for follow up shots because of the way the gas is exhausted. Then there is the firing after coming out of the water but I don't think that is much of a concern for most of us.
Go out back to the range fire off a couple hundred rounds, go in clean up is minutes the lower will have no residue in it the BCG most often is just a quick wipe down. If you spent as many years as I have cleaning the m16 you like that part.
Please understand I am not bad mouthing the DI type AR. I own them and would have no problem buying others. All things can be improved and the Gas piston is a big improvement, for those that fire their weapons a lot.
Or you could fire your di and not clean it and not have any problems
It's alive!!!!! Run away!!!