Earlier quoted context omitted.
It's not only people who actively disable JS, though. See the How many people are missing out on JavaScript enhancement? blog post[0] by the UK's Government Digital Service (aka GOV.UK). They calculated that 1.1% of users don't have the JS enhancements activated, and only 0.3% of those were browsers where JS execution was disabled. [0] https://gds.blog.gov.uk/2013/10/21/how-many-people-are-missi...
I would guess a majority of that traffic is going to be crawlers. It's probably more like a small fraction of 1% who are actually missing out. EDIT: Looks like they covered this in comments. Even that doesn't convince me for some reason.
While that's an interesting question, one of my points was about this common type of claim:
> guess
You admit you don't actually know. I don't either, which is why I program defensively and test for any feature I want to use.
A lot of people seem to be projecting what they want to see, reinforced by confirmation bias. Choosing Javascript based analytics is a great way to conclude that almost nobody uses Javascript.