Don't - it promises to be an ergonomic nightmare.
Don't think all people are equal and don't forget others may work in a different way than you expect or can imagine.
It's correct that you don't put the focus of your work on the top or bottom boarder when you sit close to such monitor. But as said, one such thing is better than having two 24" displays side by side (same H resolution and nearly same H size). I know there are people who work on small notebook displays. But there are also people like me who need 3 or 4 conventional displays to do their work. Some people constantly switching windows or scroll around. I prefer rolling with my chair now and then. I also have no problem to move my head up and down or from one side to the other. Which is by the way much more healthy (and ergonomic) than staring on a small display for a long time.
People like me who do a lot of things in parallel need a lot of display (or desk) space. I know some others work differently which is not wrong too. But especially people who do programing will quite fast enjoy when they do not only see 50 lines of code at once but 90. Of course the focus of you work is not at the very top or very bottom of the screen. But it's cool to see this portions sometimes without scrolling. The same is true when you make layouts for electronics. Everyone who have done such work knows you have to zoom very often. Of course even with a bigger monitor most of the time you work near the center line of the screen. But it's enormous helpful to see where all these traces run to the other components and have the big picture of the whole circuit board while working on the detail a the center.
Another thing I enjoy is placing some things running in the background to the edges. F.i. the firewall or memory logs or the email client don't need my attention very often. But if something happens there, it's on my workspace. I recognize it even when I'm focused on another part of the display. Our eyes and brain recognizes very much outside the small focus point. Btw. something the consumer industry and the experts in that field learned long ago. Most people enjoy big TVs or a big cinema screen more than small one even if we know for sure that our eyes can't focus on all edges at the same time.
Again, people work different and so are their needs. In fact before I bought this display I spend a lot of time thinking about the pro and cons. In the end the decision was easy. Buying two 24" instead one 42.5"? Costs are nearly the same, H resolution and size too. But the additional size in vertical direction makes a big difference. And there is no gap at 1920 H pixel anymore. Personally I would buy the 42.5" again if I could get it at the same price. But it is true, the most top and the most bottom of the display I use only for not very important things which don't need regular attention. To use the full vertical size you would need more distance than usual. But that's not how I like to work.
