It started for me with my parents crappy portable cassette player. In high school and college it was JBL, Kenwood, Pioneer, Technics.
In 1990 it was the room I am in now, only with a board (2x12 plank I think) with the same Kenwood amp on it only now much better speakers. Eventually a McCormack DNA1, and within a few more years we get to where there are some pictures, it was this: https://theanalogdept.com/c_miller.htm
My system has changed a lot over the years. But while most focus in on the easy to see big box changes the vast majority of what sets this system apart are hidden details. Some hidden in plain sight needing only the keen eyed observer to spot. More are hidden buried deep inside the components themselves. Quite a few are hidden under the floor in the crawlspace, breaker panel, even as far out as the meter. https://systems.audiogon.com/systems/8367
The evolution of my system is such that I would need to take pictures or keep a log on a weekly or sometimes even daily basis to fully capture it all. The photo's above are already out of date. https://youtu.be/vsYBtfQ3QDo?t=9