Okay. Lets imagine I had a distributed, replicated directory service with PKI (RSA no less) built right in, so you had an immediate, no-fuss PKI based replicated document store, with a simple set of application development tools which allowed you to build secure, authenticated apps in a few hours (Absolutely crappy looking, yes), deploy them across your environment, lock down the data (and optionally encrypt).. And they were business critical in a heartbeat. Oh and you could run all this on just about any damn server infrastructure you might have lying around, and on all the popular desktops (and even OS/2) of the day. Security is worked out at the document level - something that Sharepoint has failed to ever do.
Yup. We had that almost 20 years ago, kids. Before The Cloud ("Its just someone else's computer!").
Colleagues of mine migrated to Sharepoint, and proudly say, after years of becoming expert in it - 'It only takes 2.5 times longer to do the same app in Sharepoint as it used to in Notes'. Progress.
Yes, pig ugly. Yes, IBM didn't know jack shit what they had (and continue to not know jack shit), and now, whilst still supported, is let out to die by the Websphere (remember that?) management at IBM. (Aside from one notable exception in South East Asia).
Does it work? Hell yeah. Is it easier/faster/more secure/more reliable? Hell yeah. And whilst the licenses actually cost money, it's not that expensive.
Hate it as much as you like, but no-one has came up with anything that can be installed and running in less than a day that even comes close.
I do mourn its passing, as it paid for a number of my houses...
(And yes, Damien Katz was hired to reverse engineer the @Formula language engine in the Notes/Domino 6.x release - did a magnificent job. Understood implicitly the power of functional programming, distributed and replicated document stores, platform independent and highly scalable languages, and of course PKI. And went out and self-funded the development of CouchDb. Legend. We all thought he was mad, of course ;) )
Sick of BT screwing up broadband? So were we. We did our own.