:s/t:50/t:60/g
More serious response: I think after many years of training ones brain to use the features available to it some of those features become second nature and subconscious. This is great for editing and it's the reason I immediately saw that you left me a really easy way to do it, but it can make seeing the value of new features more difficult.
.some-css-rule { padding-left:50px; padding-right:50px; margin-left:50px; margin-right:50px; }
I find that I spend a lot of time in my editor crafting regular expressions to do clever replacements and I've yet to get so good at it that it doesn't distract me from my editing.