The Tektronix TDS 684B Oscilloscope employs CCD analog memory, utilizing advanced engineering techniques of the era. Users note the need for instrumentation that performs beyond the signals it measures, especially when analyzing the eye patterns of digital signals. Comments express nostalgia for the clever engineering methods from this period, contrasting them with modern designs that may lack the same innovative flair. Additionally, as technology advances, access to high-quality equipment has become more affordable, fostering opportunities for DIY projects and experimentation in home labs. Some community members are inspired to explore the potential of using CCD technology for cost-effective tools capable of evaluating modern USB3 signals. While there are technical challenges noted, such as maintaining signal clarity amidst noise, there's a vision for integrating these legacy methods into contemporary applications.