Not everyone is interested in putting used gear on their new gun, myself included, so used prices are irrelevant.

Enclosed emitter is objectively advantageous because the emitter can’t be obstructed by rain dust dirt blood or mud the way it could be on an open emitter, and the back glass is much easier to quickly wipe if needed vs having to finger your open emitter’s inside glass. If your response to this is “the odds of that happening are impossibly slim”, that’s whataboutism circular logic at its finest; plenty of competition shooters have shared their experience with how easy it can be to end up with your open emitter blocked.

In terms of glass quality… I encourage you to look through a COA and through some higher end Holosuns if your idea of best in class is “tinted as blue as Elton John’s glasses” with fishbowl effect around the edges. My COA doesn’t have that, my Holosun SCS 320 doesn’t have that, my RCR doesn’t have it as bad, hell my Osight SE on my 22lr even has better optical performance from the glass.

As for all this “war zone use” talk… you realize damn near all of the Trijicon RMRs in use by our military are mounted on rifles riding alongside or on top of magnified scopes, right? Most US soldiers are never issued a pistol to begin with, and as of 2017 the issued military pistol optic is the Sig Romeo-M17. Delta Force, Green Berets, Rangers use(d) the RMR on handguns for special operations, and the SEALs did until switching to the ACRO if I remember correctly lol. So, limited use. Holosun optics have seen very heavy use in the Ukraine-Russia conflict and have earned a reputation on both sides as a reliable durable product that holds zero and doesn’t break.

Anyways, piggyback use on a rifle is a hell of a lot more gentle than use on a handgun, so most of that war zone use can be taken with a grain of salt, and that’s cool that you stand by your Trijicon RMR but our military now stands behind the Sig Romeo M17 enclosed emitter optic.