Why not?
Everyone already flushes the low flow toilets twice.
When I remodeled my house I saved the Kohler toilets I had originally put in in 1986, just before the low-flow laws were enacted.
One flush and it is done and done.
My lib sister in Glendale, CA has a garden hose she runs into the bathroom to take care of the low-flow problem.
Yeah, and she drives a Prius.
Not if there's a big log. Sometimes you need a bucket of water nearby to enhance the flow.
I have one in the house I live. It's amazing how little water it uses to flush but it rarely fails. Undoubtedly some are better than others.