FP2: Fully In-Place Functional Programming [pdf] - https://news.ycombinator.com/item?id=36471591 - July 2023 (24 comments)
Perceus: Garbage Free Reference Counting with Reuse [pdf] - https://news.ycombinator.com/item?id=25464354 - Dec 2020 (44 comments)
Implementing Algebraic Effects in C - https://news.ycombinator.com/item?id=14887341 - July 2017 (21 comments)