I never really had issues with lack of sleep until I became father 1.5 years ago. Child has issues with sleep since the start and while it recently got a bit better, in those 1.5 years I can count the number of times I got 8 hours uninterrupted sleep on one, maybe two hands.

On the worst days I could eat double my normal food intake and was still hungry. Working and concentration is quite hard, more coffee intake is the case. Complex thoughts are increasingly difficult (e.g. improving software architecture takes much more time than I was used to).

I do wonder what happens when sleep is back to normal. Are some effects staying or will eventually everything go back to how it used to be before?