I came across it because I have a microscope component that was left sideways and learned that the inner lens of a doublet had slid on it's bonding media, rendering the component useless. Trying to warm it and gently slide it back into place didn't work (pulled an air bubble in), so I ended up on this deep dive into lens bonding. And I just really enjoyed this guy's total obsession with the trade.

It's definitely not presented as a case-study in adaptive design. It's a case study in great, edge-case content.