> If only 0.01% of my users actually are affected by such a thing
All users don't have the same value. And it's also about trends.More and more users use addons that block javascript by default,just like more and more users use adblock. You might not care today,but when it's time to care, well your competitor that cared will get the users and the revenue lost because "you didn't care".
This should have a huge *citation needed. There are a million decisions you make which affect user adoption and retention of a software product, deciding to support NoScript users is a small grain of sand in that desert. Your claim that this facet of all those decisions will result in a competitor stealing market share completely ignores the concept of engineering tradeoffs. The competitor that "cared" about noscript visitors may spend many man hours (in direct costs or opportunity cost) supporting those visitors, time may be best spent building better competitive differentiators for a larger number of visitors. No design decision lives in a vacuum, and in my own experience designing to support non-JS visitors is almost universally faaaar down the list of priorities if there are good reasons to not do so.
supporting no script is as simple as not abusing javascript in the client.I fail to see how you'd spend more man hours when not investing in these full client-side javascript frameworks when your product can work without using javascript to begin with.
See Gmail for a strong counterexample. It's UX is fundamentally about speed and responsiveness, and would have been difficult to build as one of progressive enhancement, hence they needed to build a completely separate user interface to support non-JS users.
> And it's also about trends.More and more users use addons that block javascript by default,just like more and more users use adblock.
Do you have any data to back that up? In my experience it seems like the number of people who turn JS off by default has declined since SPAs became so common. It looks like the search trend for Noscript has been gradually declining since 2009, while Adblock has risen: http://www.google.com/trends/explore#q=noscript%2C%20adblock...
All users don't have the same value. And it's also about trends.More and more users use addons that block javascript by default,just like more and more users use adblock. You might not care today,but when it's time to care, well your competitor that cared will get the users and the revenue lost because "you didn't care".