You know that the need for citation goes both ways and anecdotal evidence isn't a real reference, right? Web developers know at least JS, HTML & CSS. Too many know Ruby, Python and/or PHP. Significant amount of them know C#/Java/Go or something similar. Then there is Typescript, all those compile-to-js languages and so on. I've never ever seen a web developer who could only program in JS. That would be very ridiculous. I personally can't count how many languages I worked and had to work with. My list includes ColdFusion. I'm very comfortable with at least 5 languages and 6 platforms.

> I am thankful that Apple does not allow to litter it with some JS scraps.

Oh, so much for being objective. References and all.

> All this cross-platform talk is just being cheap, being lazy or both.

Are you even serious? You really blame engineers/developers coming up with trade-offs for being cheap and/or lazy?

> And I would not be surprised that maintaining cross-platform monstrosity eats away any cost-savings pretty quickly.

No it doesn't. I'm a developer since much more than 10 years. I guess that's enough of a reference :)