Yeah, you see, this is something too.
I've saved all of my Nuka Colas, Nuka Cola Quantums and Nuka Cola Cherries because I thought that I could make Nuka Grenades, but I can't?
Don't even get me started on how many Deathclaw Hands I have saved, thinking they'd be used for the Deathclaw Gauntlet.
And yeah, the lower level explosives are just totally not worth the investment, which I wish was not the case, but it is. I'd love to be able to just pack a good 600 Grenades and run around just throwing them everywhere. As for the Adhesive, I use mine on my Settlers mostly. I have every Settlement unlocked and ALL of them will be built up with Walls, Turrets, Crops, a bunk house for the workers, a shack for my storage and crafting, a provisioner, a farmer and at least 1 guard. Everyone gets standard or Sturdy Combat Armour and a heavily modified top tier weapon. In short, I burn through enough Adhesive already.
I assume someone will come out with a Mod anyway, but I'd rather Bethesda just rebalanced it.