It is now mostly unusable for web analytics. So many scrapers are pretending to be browsers. On my site, there is a factor 10 with what I consider an honest view of human visitors.
btw, JS-based analytics are no longer as accurate for identifying "real humans" as they used to be. bots have gotten much better at behaving like a person behind a keyboard, so it's increasingly easy for them to make your analytics tool think they're a real user