It's a small issue, not a non-issue. Or some might even be big issues but for a minority of users. They're worth addressing from time to time because they add up.

And yes, the app is probably getting the job done, which is all the more reason to start polishing the app and stop bloating it into something it was never meant to be. Focus on what does make the app good and useful. And heck, you can stop hiring thousands of engineers to build useless stuff and start enjoying all the money rolling it. (Of course that doesn't happen because every company needs 'growth' to appease the shareholders, but I digress)

> And to be honest, on the original story, as a software engineer, I would rather consider if this is a better behavior for "gap" that most people would expect? Perhaps an addendum to W3C CSS flexbox spec is a more useful avenue? Fix it once and for everyone.

I certainly wouldn't. There's 2 elements, a radio and a label, and there's a gap between them, exactly as specified in the CSS. Why would you make the gap clickable? How would you even define that? What if it was radio-image-label. The radio is clickable by virtue of being an input, the label is specified as being for that radio. Should we make the image clickable because it's in a line? Or just the gaps adjacent to the radio and label? What if the are other clickable elements next to them, which ones get priority over the gap? There's a lot of issues here, and this isn't a scenario we want to just randomly do what we think is best. That's how we ended up with HTML4 and IE.