[andybak]

While I admire your principled stand - you are in a dwindling minority so there isn't much reason to factor in people such as yourself when making technical decisions.

The SEO issue is a stronger argument but Googlebot now seems to be executing javascript in some cases so even that might cease to be an issue.

[eevee]

It's not just people like myself; it's people writing one-off scrapers, people writing new search engines or browsers (Google is not the entire universe), everyone when you forget a brace and break all of your JS, etc. The Web is not and has never been merely human beings sitting at a keyboard and using one of three known GUI browsers.