Same with me Platypus, my HP 8100 lasted almost 3 years as my only CD drive. 100's of burns later, I sold it to my brother for his 2nd system.
My new Plexwriter 12/10/32 is rated:
MTBF: 60,000 POH
Tray Loading: 200,000 Load Cycles
That means I can open it and close it 200,000 times or run it 6.8 years.