Haha, spent many hours on the Bogleheads wiki, and I do love it. But yeah, I'd love it even more if it had fields I could punch values into. If only there was some sort of site for that...

I wonder what that calculator would look like? Maybe something that lets you visualize trends of return for different fund blends?

That doesn’t seem particularly useful however, maybe something to help contrast the other common investment profiles? I just wouldn’t know which ones those are

I have a whole rant about this saved for a future blog post. The short version is that people need actionable belief. Charts are useful to demonstrate a concept, but at the end of the day, we want answers. I'm sure there's _someone_ you trust. Whether it's your dad or a friend or a podcast, I think the main gap is giving the user specific action. For example, https://finfam.app/heyfinfam/views/rent-vs-buy boils it down to Rent/Neutral/Buy. Most of the other featured views do the same, to eliminate the exact ambiguity you're describing.