Well that's cool, personally i wasn't alive in those days :)
On another note, the absolute best mail client i have ever used is FairEmail on android. It even beats Thunderbird on the desktop. If you run android i highly recommend that too.
Ha! My Unix timeline history is vague now but I’ve used SCO, DG/UX and HP/UX in anger. Pretty sure mailx was my client on most of those! :) (not to mention SunOS and Sequent at some point. And DRS/NX. But that’s not one to mention in polite company)
Don’t tell anyone, but I’m old enough to have used Netscape on Linux as my primary mail client.
So going back to thunderbird after all these years… gives me mixed feelings. But I’ll take it for a spin and see.