I disagree, if the panel was a good one when new it'll work fine for a long time, we've got tons of old DSC 1550 and 2500 panels out there with no problems.
My TV is about 20 years old, my previous car was a 1978 Honda Civic that was working great with 250,000 miles until I traded it off for a new Ford Ranger (which just turned over 200,000 miles). I've still got an old Technics turntable from 1979 that I'll never part with and a CD player from 1985.
The only reason I can see with dumping a good working panel is if it can't do some of the new things like remote access or Internet monitoring.