For sure this. I have a little compiler from 10+ years ago I was working on. And I recall after I had put it down, and tried picking it back up just maybe a ye

For sure this. I have a little compiler from 10+ years ago I was working on. And I recall after I had put it down, and tried picking it back up just maybe a year later(?) The interfaces I was using in llvm all changed. It really took the wind out of my sails for jumping back in.