EDIT: Enshittification, also known as platform decay, is a process in which two-sided online products and services decline in quality over time. Initially, vendors create high-quality offerings to attract users, then they degrade those offerings to better serve business customers, and finally degrade their services to both users and business customers to maximize short-term profits for shareholders.
2013 seems like a decent pick. NVME drives just came into existence. Windows 7 was around and still had Windows Media Center. Fiber ISPs were around. Facebook was still centered around people you actually knew and wasn’t hyper-focused on serving you engagement-bait political bullshit. Not a trace of LLMs in sight. Google search still worked. Chrome hadn’t crippled adblock extensions. Porn was accessible without privacy-violating age verification. Content was less fragmented across streaming services.
Probably the roughest backslide for me would be going without Android Auto.