Not in everyone's games. Sylean traditions don't necessarily have to be drawn just from one single old Terran source!
People want what they haven't got?
My friends and I used to think thusly: No matter how bad the hell-hole, retirement pay ensures you can escape the world for someplace else.
Plus, skill whoring. You want a competent CT character? 5 terms or more.
MT cut that to 3-4 Terms. TNE, the terms after 3 weren't worth it for skills. T4, everyone was supercompetent, so 2-3 terms kept characters with a chance of failure. T20, well, it was just two campaigns, but everyone shot for retirement again, because the aging rules weren't severe enough. Mongoose, the aging rules are TOO severe, so people stuck to 3 terms.