On July 29, 2015, Microsoft launched Windows 10 with the ambitious goal of unifying PCs, tablets, and even smartphones under a single platform—a vision as bold as it was fraught with challenge. Now, a full decade later, Windows 10 stands at a crossroads: widely celebrated, closely critiqued, and facing an inevitable sunset. Its tenth anniversary not only marks a milestone in consumer technology but also prompts a reckoning with what made Windows 10 both an essential upgrade and a divisive...