That's pretty cool! i never had the S5. Looks like a good solution. It looks like it would work on a lot of phones today.

Although, i think there are design changes to consider on newer phones with more powerful hardware. I believe they contain empty space that is there to aid with cooling the phone so the solid body of the S5 shown in the link might not work, meaning there would need to be a specific cut out space for the gasket to seal against.

I appreciate that its probably not the most challenging problem to overcome, and i would very much appreciate companies spending more money on solving the issue. But i don't think its a "one size fits all" solution in a world of vastly differing design choices, folding phones and modular phones.

Having said all that, i would much prefer for there to be less makes and models of phone and for the focus to be on designing something that won't be useless in 5 years. It should all be about longevity and reducing e waste.