In terms of “Console Wars”, I’d argue the last “meaningful” Console War was the 32-bit era in the mid-late 90s. Despite all its financial backing, SCE was effectively a “wild card” in the market and within its own corporate home.
But once Microsoft entered the fray in the following generation? It basically became corporate juggernauts slugging it out with libraries getting increasingly less varied. Now, they both sell glorified custom mini-PCs with AMD guts capable of playing mostly the same games (aside from the decreasing number of legitimate exclusives).