Agree with this. I’m done with anything with springs.

Before bed in a box was a thing I built my own. 4” of high density foam base, 3” of med density latex, 2” of low density latex on top. I swapped out the top layer a few years back, but the core is still going strong ~14 years in, and it’s still my favorite bed I’ve slept on.

One tip is you’ll want some kind of cover for your latex, since long term exposure to air will cause it to degrade.