Yeah all my MTBs have to be 800 at least now. I got some of the first ever pairs of mass produced 780mm bars made by One23, I think Kore did the other set (torsion?). Everyone said they were too big now look at them all ha. Coming from motorbikes made it feel a lot more natural for me though.
Did you try them at full width at least once? I ran a Superstar Yardstick once and it wasn't as bad as you might expect.