I can't imagine it would not be more than a few minutes of downloading the image from archive.org and running it on any VM - I would be a bit surprised if this had any kind of sophisticated VM countermeasures in it.
Meanwhile, I can believe there is some 4 million line code of something (maybe it was written in assembly!) - in any case a horrible unmaintainable mess that nobody at this software company wants to deal with anymore. Rather just rewrite it in some web based shit like half of this site does for a living.
Also on actually reading TFA - it's rife with errors - at no point in history was the DECTalk the only game in town for speech synthesis - let alone 1999! - and the idea that it was the only one with controllable pitch is hogwash as anyone with a early 90s Mac can attest.
But the article's description of how Siri synthesizes speech is grossly inaccurate.
I had to chuckle about the genius of being able to program C and Lua as if typing English - I mean that's pretty much any reasonably proficient dev.