I would expect some efficiency gains from not having to carry a diesel generator with you, and some efficiency gains from not needing to design it to fit on a train (my understanding is that bigger generators tend to be more efficient).

Interestingly, your credit card company probably doesn't care if someone steals a small amount of money from them. I'm guessing the rule you ran into was actually to prevent people who buy stolen card numbers from checking if the card still works.

I came here to post a similar comment. I find it hard to believe that the person who wrote this post is "stupid".

If those resources were freed up, couldn't a lot of homelessness charities pivot to some other problem? You're not wishing their funders away.

Some things would be different, but a lot of the skills are the same (research, running organizations, running political campaigns, marketing, etc.).

Users would find out about apps the same way they do now: Hearing about the apps from friends and/or media. If one dating app was much better than the others, people would hear about it from their friends, and people who don't have friends in the dating pool would hear about it from the media.

I also don't think it's a privacy issue to provide aggregate data about this. A dating app could run surveys asking people if they're still dating a person they met on the app. The harder part would be getting people to actually answer, but there's incentives you could try (like take a deposit and refund it if the person answers the survey), and if your app is actually life-changingly good it will be easier to convince users to take 5 minutes to help you out.

The existing dating websites do not have a reason to change -- their current websites generate profit.

Existing dating apps (presumably) make a profit now, but they could be making more profit if they were better, through a combination of pulling market share from their competitors, and bringing more people into the dating app scene (if dating apps had less of a reputation for being dystopian hellscapes).

There could be disincentives if they were too good at it (instantly pairing up all of their users into perfect marriages so the dating market dries up), but if they were really that good they could just charge a lot and front-load their profits, and they'd still be incentivized to do it before their competitors do.

I don't think mirrors are considered in safety tests at all. My understanding is that the only requirement is that you meet the tech specs defined in Section 571.111 - Standard No. 111; Rearview mirrors.. These are all physical properties like the size, mounting and reflectivity. The regulations don't require cars to have additional convex mirrors, so I think it's unsurprising that car manufacturers mostly don't bother to provide them.

I was never able to get this working in a way that was fully satisfying, but I made a note to try it again. I personally like how I can look through one mirror and have all of the information I need to do a lane change instead of needing to look at multiple.

One thing to mention is that car manufacturers do hyper-optimize for official safety tests, so I consider the fact that any car manufacturers bother doing this even though it's not on the safety test to be a very big point in its favor, and the fact that most of them don't to be neutral.