Trust me I've lost way too many arc throwers and medkits due to my hapless goons ending the turn out in the open just to heal a veteran or snag those valuable live alien specimens, losing titan armour or plasma sniper rifles, while rare, is one heck of a noticeable blow.

I had a funny moment when I finished the game:
Spoiler Alert, click show to read: 
I had two men in critical condition awaiting medkits when my sniper finally took down that last boss and I ended up watching a cutscene where the two remaining members of my team, a medic and a sniper, hauled ass and left thier friends bleeding on the bridge of a doomed mothership. No man left behind, this outfit 'aint.