> antisat weapons that only ever raise or lower their orbits and fire .22s at their targets.
raising your orbit is the hard and expensive part, it takes a lot of propellant, which generally rules out smaller vehicles, right?
And if you want to destroy a satellite, you need a lot of kinetic energy, which for a tiny projectile means lots of speed relative to the target... But since your absolute speed determines the height of your orbit, the only way to get more than ~1000 ft/s is to have your gun-sat in an opposite-direction orbit to the target, right? And isn't it the case that our satellites are all orbiting in more or less the same direction, since they launch from canaveral and have to head east to be over water?
Otherwise raising orbit is expensive(ish) depending on whether you want a circular orbit. Matching an orbit can be expensive. If the target has auto avoidance like Starlink does then matching orbit becomes war of attrition; even getting the target to burn off its fuel is a win as it will drastically shorten its life span.
Deorbiting is relatively easy at LEO, just increasing frontal area is a cheap way to achieve it. Above LEO would normally require fuel of some amount.
Can you identify a time when cost was obviously a signifcant factor in a military choice? To me it seems that cost is low in the grand scheme of things.
If they could have 1,000 asat sats, they'd want to have 1,000. Can you imagine them saying "sure, let's just have an X-37B, one, just one, it will do"? If you need these in a shooting war, 1 ain't gonna be enough. You need lots of them. You can't have lots of them if: they're big and heavy (launches are too infrequent and too expensive) or if they're too expensive (you want 1,000 but can only afford 10).
With larger anti-sat sats you could actually latch on to the target and de-orbit it for zero orbital debris destruction. This requires many more, much larger such devices because while it takes relatively little delta-v to raise or lower an orbit, it takes a lot more to match an arbitrary target's orbit (to which more fuel has to be added for de-orbiting).