We got very good at gray area nonsense. The Korean War is not a war, it's a conflict. The Vietnam War is not a war, it's an engagement. We have police actions, "peacekeeping" operations, and a hundred other things...but not "wars".
We have the "global war on terror" and the accompanying Authorization for the Use of Military Force, created in the wake of 9/11 and still in effect today.
Congressional approval of military action is fundamentally dead.
That said this particular bug for starting wars without congress has been exploited for decades with no patches in site
Never heard of Wills? Whet your appetite with his masterpiece and best work (in my humble opinion): https://www.goodreads.com/book/show/29435.Nixon_Agonistes
I’m glad that trump has returned us to a world where quotes from the 5th century bc seem like commentary on current affairs, since it means that all my time learning about power dynamics in political systems during antiquity is now completely relevant to dealing with current events, rather than a giant waste of time.