Any Turing Complete language would "fit the bill", obviously. What's wrong with a company not just kicking the tires on another language, but using it on a big

Any Turing Complete language would "fit the bill", obviously. What's wrong with a company not just kicking the tires on another language, but using it on a big project? That's how you design better languages of your own. "Go was great, except for X and Y" leads to improvements on your own stuff.