There's no "don't change titles" rule, though it's interesting how the actual rule gets truncated to that in people's minds! Here's the actual rule:

"Please use the original title, unless it is misleading or linkbait; don't editorialize." - https://news.ycombinator.com/newsguidelines.html

In this case I was thinking of both the 'misleading' and 'linkbait' bits of that 'unless'. (By the way, this is common HN moderation practice—bog standard, as I often say.)

> to choose one unprovable point until another just as unprovable point is proven

You might have a, er, provable point if that were the case! but I'm taking for granted that the officials in question did actually use this client, so "used" is known while "use" (which I took to mean "are still using") isn't yet known for sure. Did I miss something?

Edit: btw, in case anyone's wondering why we left the submitted title up instead of reverting it to what the article says, one reason is that the submitted title struck me as arguably less linkbaity (and therefore ok under the rule) and the other reason is that we cut authors a bit of slack when they post their own work.