re: Lotus Notes....
No. Not really. I've just got archives of every email since 97 (R4.6?) and the full-text search of it is brilliantly fast. And for my memory, that's great for CYA. It doesn't render embedded stuff in email hardly at all, which I love, and when Windows crashes, or if my battery craps out before closing, it ALWAYS recovers the mail file without error (20-30GB)
When I'm on a conference call and my boss or another employee is blaming something on me or some other nonsense, I have many a time pulled a quick search that finds their email long before they could even start a query on Outlook (blech.) That has helped my career out more times than I can count.
For any piece of code written back then to carry me this far with only one new version upgrade (R5), well, it's the only instance of that I can think of!