WiFi
WiFi, standardised in 1997, has demonstrated remarkable staying power for a technology. It has survived multiple protocol upgrades, weathered competition from mobile data, and continuously evolved from 802.11b through to WiFi 7. The fundamental concept of wireless local networking shows no signs of obsolescence, with smart home proliferation guaranteeing relevance for decades to come.
However, technology evolution is merciless. Future developments in quantum communication or neural interfaces could potentially render electromagnetic data transmission quaint.
The Joker
The Joker has persisted since 1940, adapting seamlessly across eight decades of cultural change. He has survived the Comics Code Authority, multiple reboots, and shifting sensibilities about villain portrayal. Each generation reinvents him whilst preserving his essential chaos, suggesting genuine archetypal immortality.
As a fictional character embodying primal concepts of disorder and madness, The Joker possesses a form of longevity that transcends medium or technology. His underlying idea cannot become obsolete because chaos itself is eternal.