A year and a half ago I started building a better personal finance simulator / retirement calculator, mainly for myself and friends/family to use. I was about T-minus one week from halting work on it and starting something else when I posted to Show HN on a whim: https://news.ycombinator.com/item?id=26969173 . I didn't even think to check back on it until during a meeting I noticed my inbox was suddenly filling up :)…
I'm a huge fan of ProjectionLab (good call on the name change)! I had just had a windfall from an old employer's IPO. Not life-changing, but enough that "save as much as I can and hope for the best when I hit retirement age" was no longer the only option. I was looking for tools to help me plot out some scenarios and the only options I could find were: 1. 5-input 'retirement calculators' that various sites had up as…
You touch on something I've noticed as well; that if you play around with models like this long enough, your intuitions start to become noticeably more refined. I can tell the way I think about finance has definitely evolved throughout the course of building the tool.