System 7.x was a work of art imo. The system was still small enough to 'understand'. Loved the old system folder layout (with folder for Preferences, Control Panels, Fonts, Extensions, etc...). Whenever the Mac had issues, the fix was generally to start-up without Extensions (by pressing the Shift key on start up) and clean-up the folder. Then add a few extensions at a time and keep restarting until the issue was found.

Extensions were often things like drivers and other code that 'enhanced' the system. Like this loveable addition: https://www.youtube.com/watch?v=GE7EWDKVM1Y