Uh huh.

Yep.

They seem to be fine with that, just causing Kessler Syndrome.

Now the SR 72 is not retired, because satellite based anything becomes extremely difficult to achieve, at best, and you can put cameras and comms datalinks on them, and have them do what satellites can now not do.

Could also do ground attack on static / slow moving targets: Mach 4-6 from half a continent away, over to a target area, slow down, open bomb bay, drop a glide bomb (or a lot of em), close up, speed back up and fly away.

You now have comms intel and air superiority, at least in an offensive sense; you destroyed the previous paradigm with your new paradigm.

If you can get a reliable 'bombtruck' style airframe, human piloted or autonomous, working at around the Mach 5 range... who has anything that can shoot that down?

The SR 71 wasn't really stealth, it just flew too high and too fast for anything to be able to touch it.

Oh and for the 'glide bombs', just do what the Iranians seem to be doing: outfit some of them with a secondary boost phase that triggers semi-randomly, based on the munition either sensing its near the target, or, sensing that something is trying to intercept it.

This also greatly relieves the entire problem of highly expensive single use long range missiles... just have a ferry for them, ease the cost and design specs of the actual munitions by doing 80% of their job.