The interesting past threads appear to be:

Hy – a Python based Lisp dialiect - https://news.ycombinator.com/item?id=24987764 - Nov 2020 (1 comment)

A Lisp Programmer Living in Python-Land: The Hy Programming Language - https://news.ycombinator.com/item?id=22361821 - Feb 2020 (3 comments)

A week with Hy - https://news.ycombinator.com/item?id=20645776 - Aug 2019 (27 comments)

Hy - https://news.ycombinator.com/item?id=20605660 - Aug 2019 (141 comments)

Some thoughts on hylang (2017) - https://news.ycombinator.com/item?id=19446381 - March 2019 (24 comments)

Hy: A Dialect of Clojure Embedded in Python - https://news.ycombinator.com/item?id=19277272 - March 2019 (13 comments)

Hy – A Lisp-flavored Python - https://news.ycombinator.com/item?id=14909786 - Aug 2017 (215 comments)

Hy - https://news.ycombinator.com/item?id=12893703 - Nov 2016 (5 comments)

Show HN: HyREPL, Hylang nrepl server - https://news.ycombinator.com/item?id=9869478 - July 2015 (7 comments)

Live-Coding Blender with Hy - https://news.ycombinator.com/item?id=9850058 - July 2015 (30 comments)

Hy – A dialect of Lisp that’s embedded in Python - https://news.ycombinator.com/item?id=8696975 - Dec 2014 (77 comments)

How Hy backported “yield from” to Python 2 - https://news.ycombinator.com/item?id=8641126 - Nov 2014 (22 comments)

Hy, a Lisp that compiles to Python - https://news.ycombinator.com/item?id=7214400 - Feb 2014 (60 comments)

Hy: The Logical choice - https://news.ycombinator.com/item?id=7123395 - Jan 2014 (12 comments)

The State of Hy - https://news.ycombinator.com/item?id=7069781 - Jan 2014 (16 comments)

Try Hy - https://news.ycombinator.com/item?id=6700103 - Nov 2013 (64 comments)

Hy - dialect of Lisp that's embedded in Python - https://news.ycombinator.com/item?id=6245191 - Aug 2013 (1 comment)

First steps with Hy, the Pythonic Lisp - https://news.ycombinator.com/item?id=5924709 - June 2013 (28 comments)

Others?