Just an observation. I'm old(ish). I needed to train hard enough to reach a point where my slower recovery became a problem for me to really grasp that. My body still hasn't recovered from the lunge walks I did 5 days ago. It definitely reminds me of what I didn't like about crossfit. Being sore all the damned time. I have always been able to just push the age envelope back and tough it out. Take the attitude that "I'm a badass and you aren't, that's why I can do things you can't". I wasn't enough of a dick to say that to people but it's what went on in my head.
Well, I'm not a badass anymore. The heat kicks my ass now. And it takes days to recover. Volume tears me down and it takes much longer to recover than it did just a few years ago. I need to start programming accordingly.