If it ain't broke don't fix it American informal slang
I am not planning to change my furniture because I think if it ain't broke, don't fix it.
Your ideas to update the computer system are not appreciated because if it ain't broke, don't fix it.
1. Good or fantastic
2. (of a person) Attractive, or sexy
3. A sexually attractive person
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This American slang is said to have originated in the 18th century, but the literary origin comes from 1977 in a "Nations Business" newsletter quoted by Thomas Bertram.
To be outperformed or outrun by someone, usually by a very wide margin.
You have to be quicker to finish this task or you will eat other my dust.