Whenever you use any "super glue" type product, there's a real danger of permanently fogging over any plastic in the immediate vicinity. The hinge is so close to the screen and keyboard, you MUST cover these areas.
Eight years? You must really like your machine a lot. [Not that there's anything wrong with that!]
I don't mind if the glue/reinforcing plate doesn't look good, as long as it doesn't affect the functionality of the laptop. But obviously I will try to make it look neat.
My main PC is a desktop that I built a year or so ago. That cost just under 40,000 baht and is quick. But the laptop cost double that, 8 years ago, and works fine. Before I built the desktop, I used the laptop to download torrents at 1.5 Megabytes/sec, watch HD movies, do video editing, etc. But now I just use it for browsing the web when I'm out of the house.
The main drawback with the laptop is that it weighs a ton. But since the cd/dvd still works, the SD card reader still works, the Wi-Fi works, the LAN works, why not fix the hinge? It also has Bluetooth, but I've never used that.