Independent of the possibility of FLM on the HS side (I can't prove there was or wasn't), I'm guessing why you heard so much about it from the HSL guys was because so many of them had to track it personally. For HS, "Maintenance" worried about such things, but for HSL, a JO on every Det managed it with maintenance, and usually it was 2 JOs (MO and Ops) since they "should" have been working together to meet it on deployment. Plus the OIC would/should have been hawking it, too.Yeah, I meant my timeframe in 06-09. I never remember my HS buds talking about an FLM concern but the 60B guys wouldn't shut up about it. The 60F/H airframes were no were near as old as the 60Bs so if there was a FLM program I doubt it was as closely managed especially with squadrons transitioning to the 60S.
The other reason is because Romeo wasn't coming and the community knew it screwed up and tried to make due with the SLEP. The COs and O-6s that put the community in that position knew they had to follow the new plan to make their birds last, so it was always a thing on people's minds.
It's still a thing in HSM land now, but with the excess airframes the community has, the Wings are able to move assets around to manage the problem. Much smarter than what HSL did.