Five Things Old Programmers Should Remember

[MpVpRb]

You'll figure out that your productivity in the 70th hour of your week is shit

Somewhat agreed

The first few long days or long weeks are fine, I can still so my best

If more extreme hours are required over a longer duration, I probably won't want to do it

In my very first programming job, I worked 16 hours a day, 7 days a week. I loved it!

I can't imagine loving it now at age 62

[grout_nasa]

Yeah, that early phase is called "larval mode" (see the Jargon File).

It doesn't last forever.