Later, I switched regulary between bowed DB, 4 string and 5 string. DB -> e-bass (or vica verse) took quick run through B or F major, finding all G's and i was ready.
Upright is a different beast - totally different approach and mindset so if one lands in my hands it isn't a challenge mentally. As for 4 vs 5, I often key off my lowest string for positions and notes. For my simple brain, if that changes (B vs E) then I have to think - and thinking is a bad thing. Also, I've arranged certain bass lines on certain tunes, and often incorporate the low B, usually up the neck. While I can rearrange on the fly, it is a pita. And I also play a fair amount of lower 5th ghost notes, and if you're playing on the E string you now have lost that ability. Not the end of the world, but if it is part of your playing style, then you're missing something. You can get creative and work around it, but depends on what your goals are. In some bands I need to nail the parts, and whatever tool allows me to best do that is what I'll use. For others whatever tool works best for them is what they should use. Just offering my personal take on why I don't go back.
