Thanks! We've taken that out of the title now.

Also, please don't put things like "Part 2 in the series is up" in the title when submitting an article. HN readers are not fond of marketing noise, and the site guidelines ask you to use the original title, except when it is misleading or linkbait.

https://news.ycombinator.com/newsguidelines.html

Also, it's generally not good for HN to split blog posts into series, let alone 4 part series. The later parts rarely get as much attention as the earlier ones, and we penalize follow-up submissions because they are repetitive: https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que....