Its only a matter of time before we with dual pane frt side windows have this moisture problem. Ours were fixed/repaired somehow 3 yrs ago as part of our purchase deal.
My main concern besides visability is noise, especially on the drivers side where I sit 100% on the time. The short arm Crapco mirror on the driver side has to be folded back to just outside the driver side window and the wind passing around it makes for a fair amount of “wind noise”. The thicker the barrier between me and this noise maker the better.
The quietest coach we’ve ever owned(SOB) had long arm Capco mirrors that could be positioned forward so as to be viewed thru the windshield, not the side window, due to A pillar vs seat location.