On using Semantic Web technologies in a way that solves problems and delivers value:
https://bibwild.wordpress.com/2014/10/28/is-the-semantic-web-still-a-thing/
miniblog.
Related Posts
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.)