Hi everyone!

I could use a little advice.
Here's the situation: I have an Olivetti Echos P133C.
The laptop itself works perfectly fine. Unfortunately, the plastic has become very weak and brittle, forming cracks around the hinges.
I worry that the display will snap off because of that.
What should I do?
I try not to use superglue because I think it will do more harm than good. (I've had a few bad experiences with superglue in the past.)
In your opinion, what is the best way to repair cracked plastic?

I'm eager to hear your thoughts.
Thanks in advance for your help.

I will gladly attach some photos if needed.