It's not really hacky as far as I know, it's just the old status quo. On X applications could scale themselves if they have high DPI support, and that's what KDE is allowing. And it works great. The vast majority of apps I use support high DPI on X, and they work perfectly fine on xwayland.

It is legitimately a great experience using xwayland like this. A lot of apps I use, they look perfectly fine, they perform perfectly fine, and they're not broken, which is a massive plus.

Of course, this probably does break one or two apps out there. I'm not saying it's a perfect solution. It's far from it. But honestly, I think it's a really good solution. It allows developers the ease and flexibility of developing for X11 if you don't need Wayland's features.

Of course, you are still losing out. Having proper touch support is such an amazing feature with Wheland. Don't get me wrong. I love a lot about Wheland. It's just a pain in the ass to develop for. It is nowhere near as flexible as X11.