Okay. Why didn’t the US “cripple the enemies Command, Control, Communication, Computers, Cyber, Intelligence, Surveillaince and Recu” in Afghanistan and Iraq and end the war in five minutes? Oh wait, we basically did. And then fought against guerillas for twenty years.
Okay, why didn’t russia do that in Ukraine? Oh yeah, they tried. The opening hours of the war involved paratrooper attacks on key airfields coupled with ballistic missile strikes against fortifications. They failed, lost a LOT of their actually competent soldiers, and then had to deal with overextended supply lines.
And yeah, russia are fucking incompetent. But even the US can fail at a mission objective. And, unless you are willing to switch to nukes immediately after, means you are now in a “real” war.
Ukraine “changed everything” except… it didn’t, really. A lot of this has been known and is the basis for a lot of the (often times batshit insane) strategies and plans of The Cold War. It is just that West Point and similar analysts love to push along topics that lead to increased spending toward the military industrial complex. And… I shouldn’t have to explain why…
And the fancy guns ARE incredibly useful. If a war can be “won” without fighting it, all the better. But that has not been the indication of the past century and the reality is: When you run out of the fancy stuff, you are back to boots on the ground.
But stuff like the M5* and (arguably) the new APC everyone hates are very much showing the realization of this. Part of it is realizing that people just don’t want to be in a standing military anymore if it means they might get shot at. But it is also acknowledging the reality of what a “real” war will be.
*: I lack the expertise to properly explain it, but even the switch to the 6.8 round is this. At a high level, the 6.8 round is less about body armor and is more about doctrine. Because even top of the line “Jack Bauer is gonna murder some fools for shooting his girlfriend” body armor is not going to have you shrugging off a 5.56 round to the chest. It might not kill or even wound, but it will take someone out of the fight long enough to capitalize. It is more about making every shot count and changing doctrine from highly skilled techniques like suppressive fire (knowing where to shoot rather than just aiming at the head when it pops out) and bounding advances/leap frogging. Which hearkens back to the days of “Well, most of them can’t hit the broad side of a barn. But when they do, things die”