Ad: This forum contains affiliate links to products on Amazon and eBay. More information in Terms and rules
They're getting pretty long in the tooth now. SE strike eagles for Saudi are new build though, so the operational life will continue another thirty years, but the USAF fleet is definitely getting old. Many already retired for airframe hours. At the moment the sharp end of the sword is Vipers and navalised force projection, or diplomatic threats. Advantage in large scale conventional land based operations could be shifting back eastwards, the modern CIS military is nothing like what it was in the 90s. They're just finishing up a complete avionics updates on the entire VVS air fleet (SM/S/SMT modifications) and have started equipping Su35 to deal with Raptors. Meanwhile now it is the US economy in shambles.
You're looking ahead. I'm talking right now today. The CIS is in a surprisingly strong position north of the Caucasus, militarily anyways. NATO has been sapped in the middle east for the last twenty years, the only thing the Russians have been doing is trying to bring their district commanders under control (like the one who invaded South Ossetia, or the Captain of the Moscow battlecruiser that did a missile attack on Georgia). Their Afghanistan was over twenty years ago now, and they didn't spend a cent on defence budget through the 90s, except for a helicopter force that was already paid for.
The US went and, you guessed it, commissioned yet another carrier battlegroup. You know how many thousands of millions of dollars that cost right? The US is almost committed to venturing from Afghanistan into the Caspian oil table and that's going to be like dropping nukes on the Kremlin.
The tell is what happens with the Iran thing. The concern is utterly fictional. If the US moves on Iran, they're making for the Caspian oil, there is no question. Russians will see it that way too.
Doens't matter - despite what you might see in the crystal ball, the point is the US economy, although bad, is far from being in shambles or anything close to what the CIS was in the early 1990s.