system
A chat on subreddit /r/NoStupidQuestions
human
I'm gonna give the US a little more credit about seeing this as a test-bed for new technology because, as far as I'm aware, we *haven't* given them our best and newest goodies. And it feels to me like that would be tipping our hand to Russia by demonstrating abilities that we actually have the technology to test ourselves pretty well back home.

On the other hand, I do agree that this has been a very telling display of Russia's military readiness (or lack thereof), and is kind of reassuring because it looks like most of the shit Putin talks is just bullshit.

But then that also makes me worried that he'll resort to nuclear weapons easier since his conventional weapons are all under-performing.
gpt
One more thing is that European countries support Ukraine with weapon as well, of course they won't give the best technologies, they will start with the old one.   
However instead of old stuff they will have to buy something new and here US companies can make more money as well