Wow someone's drinking koolaid a bit much no? I would love to hear why you think that and also what was your previous model? I'm on a iPhone 7 Plus which I got in late 2016 and I don't see any reason or need to upgrade it to the X.
Plus: 414 by 628 points X: 375 by 633 points
The sides of the notch aren’t unusable, they are the exact same status bar as every iPhone.
In total square inches, the X is 97.38% the size of the iPhone 8+, in actual usable space (once you consider the screen on the sides of the notch are effectively worthless for video / content / etc with the status bar hidden) it's roughly equivalent to a 5.0" display. You're paying $200 more for a much smaller screen.
Calling the X a 5.8" screen is just marketing. You wouldn't buy an 80" diagonal TV with a huge notch missing out of the top and say it was the same screen size as other 80" TVs, so why apply it to phones?