[mr_toad]

> Nothing ever gets obsolete once it gains a large foothold in the enterprise space.

Lotus? Delphi?

[ncmncm]

Both still in very heavy use. In 2014, anyway, every single IBM employee had to keep a Lotus Notes window open. It was hellish.

Dunno if that's changed since Red Hat took them over.

[hkmurakami]

Used Lotus notes as recently as 2010, I am pretty sure it's going strong in my megacorp former employer.

[Spooky23]

Lotus is all over in government and insurance. As a mail client it is mostly dead, but the apps live on.