plawolf
Lieutenant General
Military camouflage, in that sense, only has a limited use nowadays. Unless you can hide it's heat signature, it's bound to be detected by any military fielding modern equipment. However, if you're in a rather low tech war, camo like that is still worth the effort.
Funny, I remember people saying something remarkably similar about the aircraft cannon, body armor and plenty of others.
The militaries around the world still evidently seem to think camos are a good investment since no-one has decided to paint their tanks or planes bright pink yet.
Modern thermal imagining equipment has useful lives just like anything else. It might not be limited to hundreds or low thousands of hours any more, but they do wear out after a certain number of hours of use. That is why no-one runs around with their thermal sights on all the time.
Even when you do have your thermal gear switched on, they only have a limited field of view, and if it is an active battlefield with large fires burning, you may well find your thermal gear rendered ineffective, in which case, you need to rely on the good old fashioned Mk 1 eyeball. There are plenty of other examples I could list, but I think I have made my point clear enough.