Great product. It was forked from Railo (no relation to Rails), and the founders of Lucee came from Railo when they didn't like the direction Railo was going. The point is that Lucee is 16+ years old, and a popular alternative to Adobe ColdFusion.
Coldfusion had a bad rep but it was actually a pretty good tool to work with. Railo made it a million times better in every way - the performance was solid and the environment was full featured enough to let you focus on the code.
The original adobe (macromedia, right?) version was a mess. There were no functions but you could import modules. Massive caveat that those modules were allowed to mutate state outside of themselves so people would import them to, for example, run some db queries and set some variables in the calling code with the results. You can imagine the absolute unmaintainable mess that ensued.
I want to say Macromedia mostly bought ColdFusion for it's editor. The language seemed to be a bit of afterthought.
https://cfdocs.org/coldfusion-versions
CF is interesting because it started as basically server side includes with some extra features to connect to a database. It was meant to be very approachable and not general purpose. Like a distant ancestor to Jupyter and Observable.
That approachability made for some big messes, but it also spawned a huge community of software developers who might not have gotten into it otherwise.