"Ancient BASIC dialects" seems like a rather small obscure domain
and as they say, they're not making any more of them. I'd think
that if you trained an AI on enough examples, they'd do much better.
The BASIC language isn't that complex compared to modern languages
where people are finding AI as a useful assistant, like it or not.
Think of it like old-school "pair programming" that gives you
a friend in your cube to talk to.
- John