On the tank side, some planned updates/replacements for the Abrams were very suddenly canned and went back to the drawing board. The DoD didn’t say why, but a good guess is that they saw how things were going for tanks vs drones in Ukraine, and decided that these new designs would be obsolete before they’re built.
No way they’re replacing the bigger ones, like the Moskva. That one was built in a yard that’s now in Ukraine, and Russia hasn’t gotten that part back. Even if they did, Ukraine hadn’t really maintained it.
It was also launched in 1979, and they haven’t built anything that size since the USSR fell.
They’d have to rebuild the infrastructure needed to build the ship. These losses are irreplaceable.