I can do 8 or 9. I can do more than that but not for sustained periods.
If I'm programming 10++ I'll usually burn out after a month or so. Burn out usually means that I don't have the focus or will to get in a solid 8, more like 4 - 6, for a period while I reset (whatever it is that gets reset).
If I'm programming 10++ I'll usually burn out after a month or so. Burn out usually means that I don't have the focus or will to get in a solid 8, more like 4 - 6, for a period while I reset (whatever it is that gets reset).