sturobson's reli-css is the bomb! it helps you dig through old code and find those pesky bits that could use some modern love. i mean, who hasn't been there-using selectors from an era long gone? this tool’s genius lies in its ability to point out outdated stuff so we can update our stylesheets with newer techniques. have any of y'all tried it yet or do you have your own favorite tools for keeping css up-to-date?
Source:
https://css-tricks.com/relicss/