Thunderbird is such a great program. Ever since I gave up Mutt as my default email program, I've been using all the time. One of the richest guys on the planet (Zuckerberg) was using Thinderbird in a photo some time ago I think. Perhaps if he reads HN; they can get an infinite lifeline.
If a normal person were also a billionaire, they'd stop for half a second and call someone and say "hey, make sure Thunderbird is good for forever."
These people can't think that way, they're hampered by the mental defect of "Hmm, what's the angle, how can I make money off this? I can't right now, okay so I'll do nothing."