As a matter of fact, I started learning LilyPond last weekend using Frescobaldi, because of its awesome midi input, and because I figured I might get more efficient with code than with a WYSIWYG editor (I use MuseScore). Frescobaldi is a very nice way of getting started. It generates code that you see, you can use buttons for features you don't know yet and then you can type code directly when you know it. Frescobald…
(c d e f g a b c)
which indeed looks more natural because resembles the way parentheses are used in mathematics and programming.
If I remember correctly, the change happened ~20 years ago because it made the notation more consistent: everything related to the note happens after the note name (durations, staccato, marcato, slurs, etc.). I remember that it took me several months to get acquainted with the new syntax.