2016: https://news.ycombinator.com/item?id=11573172
2017: https://news.ycombinator.com/item?id=15617633
https://news.ycombinator.com/item?id=14669913
Many other articles (but not many comments):
https://hn.algolia.com/?sort=byDate&dateRange=all&type=story...
https://hn.algolia.com/?sort=byDate&dateRange=all&type=story...
Posits are Type III Unums IIRC, the original proposal was with Type I Unums.
Previous proposals were variable length formats, which is pretty much a nonstarter for a variety of reasons. This proposal (posits) is a fixed length format with variable length fields.
https://marc-b-reynolds.github.io/math/2019/02/06/Posit1.htm... https://hal.inria.fr/hal-01959581v2 https://hal.inria.fr/hal-02131982
The bottom line is they are a tradeoff; they certainly aren't purely better than IEEE floats. Plus they seem to have a non-trivial hardware cost (one of the linked papers shows the adder is twice as large as the equivalent IEEE adder and has double the latency!)