not enough free time: Probably the most common
[groan]
I got distracted from all things Pascal for *months* by my custom portable PC project that eats time and money like no tomorrow. I'm already at 3x the expected budget at it only just begun. Would be much worse if I actually damaged my GTX1060 while cutting the unnecessary butt part off with a handsaw (too long; didn't fit).
Must pet my cats more, calm my nerves.