Backdrop and Drupal
I first picked up Drupal at version 4.7. It's been a while.
And it's changed. A lot.
I miss it. I spend my days working in WordPress, for the most part. It's okay. I have some pretty serious philosophical differences with the way WP is structured (The Loop is not my friend), but it's okay.
But I miss Drupal. Or to be precise, I miss the Drupal that existed at v7, when I was still actively advocating it to everyone with enthusiasm and joy.