That's an interesting idea and I think it would work if you're okay with missing the upper bass sections. However, even on my 8-string doing jazz I don't always walk my bass lines on the two lowest. Probably about 50-60% of the time I'm down there. It's nice to bring it up for the mood ebb and flow. After all, when was the last time you heard Ron Carter stay on his two lowest strings for very long?