@dias_jorge long story short, makes code more readable and sigil is move towards syntax algebra (proof by syntax alone).
The Sigils WAR, Language Design and Coding Convention
ergoemacs.org/misc/an_eulogy…
elisp. Major rewrite of a command, using completely different approaches.
Left: text processing.
Right: turn the text into nested list.
In this case, the nested list is shorter, more readible, and actually more features.