Agreed, I make small tweaks occasionally to improve some behavior and it gives me a good feeling deep down to know I can change what any key does at its most basic level. I don't even use layers too much but most of my keys will have both a tap and tap-hold option and it's crazy to think that I can choose to change it at any time without any issue, and having it carry over between computers since it's all in the keyboard itself.

I still haven't figured out a good combination for an Esc/backtick key since I use both keys pretty commonly and there just isn't space for both.