Fair enough. Still, there are two separate steps here: collecting crash reports and sending them. What if the app asked if it can send the report, letting you optionally review it? Many programs today do that, I think it's an effective compromise. Additionally, the app could store some amount of past crash reports, and the places for the users to get the support e-mail (a form, a button, an address in a help file...) could request you to check for, or automatically call up, those past crash reports, and give the user choice to include them. The way I see it, the app should give users near-zero friction to opt-in, but still have them opt-in.

It won't solve the problem of bad support requests completely, but nothing ever does - random people will still write you with problems for which you have no data (e.g. network was down when crash occurred), or for which no data exists (because requester is a troll).

> For usage data, it allows developers to focus on features that matter and know which ones you can remove.

I accept this as an argument in favor, though personally, I don't consider it a strong one. I feel that "data-driven development" tends to create worse software, as companies end up optimizing for metrics they can measure, in lieu of actually checking things with real users, and thus tend to miss the forest for the trees.

Picking good metrics is hard, especially in terms of usage. The most powerful and useful features are often not the ones frequently used. Like, I may not use batch processing functionality very often, but when I do, it's critical, because it lets me do a couple day's worth of work in a couple minutes.

So, for me, can usage telemetry improve software? Shmaybe. Is it the only way? No, there are other effective - if less convenient - methods. Is the potential improvement worth sacrificing users' privacy? No.

> on iOS crash reports are opt-in, and only about 20-30% of users have them enabled. That is fine for huge programs or ones with little surface.

I feel the main reason this is a problem is because of the perverse incentives of app stores, where what you're really worried about is not crashes, but people giving you bad reviews because of them. Mobile space is tricky. But then, forcing everyone into opt-in telemetry doesn't alter the playing field in any way.