i'm concentrating every moment i'm awake, for some values of "concentrating." Though if it's something too mentally laborious it would be hell. Programming, for example, I probably couldn't do 8 hours a day. The easiest thing to concentrate on would be social interaction or TV.

sure. In a former life I had to in order to live🙂

No

Nope. Concentrating for any amount of time is impossible, it can't be done !

no, my attention span lasts about 15-20 min

No, my employer can attest to that.

In the office I can. At home, not so much, but I work longer to compensate.

Not without breaks, no.

Nope-o

No way. It'll burn my brains, or what is left of it.

Nah 😭 i wish I could tho. Would help me a lot

In a row? No.. And I don't think anyone can do it. The Mind automatically disconnects at some point. Even for a few minutes to rest.

No, sadly. I have small bursts of high productivity instead of a constant flow.