uh, you see, your understanding of western weapon/military supplies stocking is deeply flawed. Unlike russia, here in NATOland we keep old, functioning stuff mothballed just in case, alongside the ready-to-use and the currently used, modern stuff. That's why we were able to load Ukraine with effective weapon systems (largely 20/30 years old but still functional stuff) and supplies, while keeping our defensive capabilities mostly untouched.

It's just that soviet era crap that was sitting in eastern european countries is running out, so we're starting to send newer and better stuff that's just slightly newer.

It'll be a looong time before the MICs from the combined NATO nations will have to actually start worrying about actual suplly issues :D.

EDIT: grammar 'n stuff.