10% Operating System

Here's an idea, What if 10% of the CPU and the RAM is exclusively allocated for the operating system?

Often software engineers run a couple of IDEs, browsers, few applications, postman and what not! Sometime there is a buggy code, a long running process or a software update going on in the background that affects the user.

Let's say, the softwares can use upto 80% of the system without any issue. And if some process tries to/uses additional resources, the user is prompted to close one of the applications. and if a particular application needs resources over the 90% quota, the application will be terminated.

But the 10% is kept exclusively for the operating system, so the user can go around and close other applications or restart the system easily