Agree with what @geof3 said.
Some folks upgrade components more frequently to simply try different things and learn. Curiosity gets to us all at some point. Keep in mind a few have been at this 40-50 years, changing less frequently over longer periods of time and reflecting back on experiences. Worth noting the newer folks who've only been at it say 2-5 years may change out gear more frequently in the early years of their journey.
The old days of going into a nice stereo shop to figure it out up front are winding down leaving many to guess reading internet forum posts, rolling the dice some.
Sure seems about the time when digital "glare" and crappy digital tracks/recordings came along with a variety of different streaming services, this is when people really went nuts and started rotating all sorts of different gear in/out more frequently at every layer of their systems in an attempt to get rid of it. Good recordings help. :)