For whatever reason (I'm a software engineer), I particularly enjoy content about everyday physical goods. Knife steel has just been added to my bookmark list, but here are a couple more I think are worth sharing:
Making the ideal wool fabric for outerwear: https://weatherwool.com/pages/the-weatherwool-difference
Choosing the ideal card-holding material for leather wallets: https://ashlandleather.com/blogs/inside-ashland/johnny-the-f...
The grades and quality of Panama Hats: https://www.brentblack.com/panama-hat-grades-explained.html