I'm younger than most here iirc and got my eagle in like... 2003-4? Something like that.
Cub Scouts at this point I can't really say I got much out of. Pinewood derby racing was fun and I did learn a bit doing that but I feel like I don't remember much of anything from it. It is valuable when going into boy scouts however because you'll develop relationships with your peers in the troop and the adults around it.
Boy scouts I retained a lot of and think it's overall a good experience. Camping trips and scout camp are good for developing independent traits and learning to be on your own, away from the parents, etc. I can't say the merit badges were all that worthwhile, what I've retained came more from the tangible experiences - camping, sea base in key west, hiking, scout camp, chicken BBQs, flower/candy sales and the like.
The real problem I had with it was how they cling to old pomp and circumstance and are just generally kind of outmoded. I didn't mind people knowing I was a scout, but that doesn't mean I didn't feel ridiculous wearing my "class A" uniform with those ridiculous socks and short shorts and fugly hat. Also a lot of the ceremonies and such are really, really longwinded.
I don't regret it and still find value in having been part of it but I think it wouldn't take much to modernize the program and make it more palatable these days as well.