Disadvantages of using consistent-behaving yet deprecated HTML tags?

Question

When users visit my website, they don\'t care about how perfect or how much standard the page is coded. They only care about whether it works or not.

Answer 1

CSS provides easier maintenance, for one; client decides they want some elements aligned left instead of center? Change your css rule and poof, you're done. But if you're using old-school valign and such? Get ready to go change every single instance of that in the file(s).