Question: do powerboaters not use diesel gensets? And if so, do they not
smoke
or puke?

I would imagine if they have diesel engines they would use diesel gensets.
My friends all use gas and therefore gas gensets. Don't even know when
they're running.

Observation: What do we make of the sailors who, like me, have solar
panels to
keep the batteries charged?

The sun is free. The solar panels on the other hand ...