From what I have read on this list, it seems that Compact Flash memory 
cards have a limited number of writes and do not last as long as a hard 
drive. Is that correct? How long do memory cards last compared to a 
Microdrive or PCMCIA hard drive? A Microdrive or PCMCIA hard drive has 
a greater number of writes and a longer life in general but the 
downside is that it takes a much heavier toll on battery life. Am I 
correct is this understanding? I would like to clarify this in my head. 
Thank you.

Bryan