the.com/finishing touch

The last 2% of effort that gets 50% of the credit.

means The last small addition or adjustment that completes something and makes it feel done.

from A straightforward phrase from 'touch' meaning a light stroke of skill, as a painter or craftsman applies — the literal final touch of the brush or hand that completes a piece of work. In use since at least the 1700s, it carried over from physical craftsmanship (finishing a painting, a piece of furniture) into general use for any last perfecting detail.

law of diminishing
violates it, somehow gets noticed most
timing
always comes when you want to stop
risk
one more tweak and you ruin it
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