The advances with digital differs from that of analog sources. Analog has been around for long time. Digital? Not so much, so they are discovering and advancing just like they did with analog back in the day.
So given all the current technology... in effect the new digital technology, including powerful computers with CAD and engineering software ... the pace of development hasn't changed? I think it has changed for the quicker. But we were talking about the rate at which end-users replace or upgrade their analog or digital front-ends.
In the case of stereo cartridges, these are consumables; they are only good for a certain number of hours. Tonearms don't turn over that often and those are dependent on the availability of armboards such that options are limited to the armboards the turntable manufacturer has available. Imo turntables do get replaced but not that often, same with phonostages. People do roll tubes in tubed based phonostages but I'm not including tweaks in my speculation.
This is not about preferences -- although given the reactions some may take it that way.