Y Combinator (YC) is celebrating its 20th birthday, highlighting its significant impact on the startup landscape since its inception. Founders credit YC for their entrepreneurial journeys, and nostalgic reflections on its history are common, including discussions of key figures like Paul Graham and Jessica Livingston. Many users express gratitude for the opportunities provided by YC, which has fostered innovation and created successful companies. However, comments also indicate a concern regarding the potential saturation of successful YC-backed companies in recent years, suggesting that the future of startup funding may require new models of disruption. There's a prevailing sentiment that while the past successes of YC have shaped the tech industry, navigating forward will demand a higher level of expertise to disrupt established industries. Also, some believe that emerging technologies such as AI could play a crucial role in revitalizing entrepreneurial success for YC and its founders.