"it’s safer to add or remove classes on a specific HTML node than to add or remove styles in a class that applies on many elements"
A defence of utility-first CSS, and how semantic classes can convey less information:
miniblog.
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On how far programming language research has come, and the maturity of tools and techniques that make more ambitious projects viable:
Common Lisp has a function change-class that lets you change the class of instance (like reassigning __class__ in Python). http://clhs.lisp.se/Body/f_chg_cl.htm
I love the note at the end: "semantic difficulties" if you call any methods whilst the class changes!
Beyond structural editing: semantic editing! https://reasonablypolymorphic.com/blog/towards-tactics/index.html
(Uses Coq-style tactics.)