Every time a thread like this comes up, I feel that I would like to read some comments that are not assertions on why JavaScript (or Python for that matter) is a bad idea to put on "everything".

If nothing else, it seems like a good idea to make microcontroller programming more accessible using one of the most used languages.

I'm not sure arguments regarding performance, or how readily available learning resources are for lower-level programming languages, are relevant here because those are likely not the concerns for anyone who wish to take advantage of frameworks like the one in question.

To many people the programming part is just a means to an end: for example, making LEDs blink for costumes. So why not celebrate when there are more accessible solutions available to them?