Earlier quoted context omitted.
javascript and python support seem like huge improvements
I might be wrong but I believe the problem with using these languages in industrial applications has to do with the back end running them as these os's are subject to system calls or interrupts that mess with critical timing situations. I believe this is the reason 3D printers and other CNC machines still use a seperate dedicated controller such as original arduino rather than just using the GPIO on a newer arm board…
Factory automation applications written in BASIC have been a thing for decades. Javascript & Python are improvements in many ways.
Like everything else in engineering, you have to know what you're doing, what you and your tools are capable of, and what performance is needed. Not everything has a 1ms deadline and the vast majority of so-called "industrial" applications will work perfectly fine on a 1-second loop.