On a good day, I work about 5 hours a day. That's non stop, from about 10.30 until about 4pm, or from about 3pm to 8pm.

If I stop for lunch, I stop, and don't get back into it.

So I eat lunch at my desk. It's not bad for me. 10 hour days to accomplish half the work is bad.

Why not just skip eating for those hours? Digestion disturbs brain activity anyway.

Because it is hard to be effective at work when you are hungry

If you stop eating at a certain period every day, you'll stop feeling hungry.

Sometimes I'll get into 'productive' first thing, at 10amish. Other times it takes a few hours, so it's random.

Once I get into productive mode I'd rather not get out of it until I'm finished, and leaving my desk for more than a few minutes, or having to concentrate of complex tasks like talking to someone at a counter, is sure to do that.

you might stop feeling hungry, but you'll then get mysterious headaches or a sense of confusion and frustration you can't identify.

Eat a lot before? 5 hours seems like very doable without hunger.

You can split the work and do the rest next day, there is no rush, really.

There is rush. Tell that to people who die because medical technology is delayed years. Or companies that fail or never materialize because the products take too long to produce and are too expensive.

Tell that to the farmer who's crops go bad.

Not everything is the same.

FAANG companies don't do any of those things.

But dying with overworking, depression and burnout is not a solution I believe.

5 hours a day doesn't sound like overworking.

While I'd love to only work 2 hours a day, it's not really feasible.