[ape4]

The html is in lowercase so that slightly helps to calculate a date. (Older websites were all uppercase)

[freedomben]

I was strongly opinionated that upper case html tags were better and more readable, and I still believe that it should have won. Building sites in '96 nearly everyone upper cased.

Now that there is syntax highlighting though the readability benefit is minimal so not a big deal. I still think SQL keywords should be capitalized though...

[rbanffy]

I think making everything lowercase hurts reading code. I really liked reading Pascal code where all keywords were uppercase.