It adds up but it would require to rewrite all software, which would be pretty costly.
I agree with the sentiment but it's a bit too late now.
The problem is with how software is designed around being cheap to write.
It's just Brave browser, you don't multiply by the number of every kind of service
With your attitude towards improving one piece of software, it becomes every piece of software.
This kind of lazy thinking is why today’s software is so bloated and slow.