Maybe a little more than zero. Dip pens can work just fine with fountain pen ink, although why you would want to use with them an ink that has been heavily compromised to meet the special requirements of fountain pens is rather a puzzle. People have been using portable dip pens since the middle of the 19th century without difficulty. And yes, dip pens have a reservoir that doesn't require constant dipping. It just happens to be external to the pen holder. The idea that dipping a pen is some sort of interruption or great imposition upon the writer is simply a misunderstanding.
Note that dip pens have survived for a century and a half. They were most widely used when people wrote much more than they typically do today, including spending an hour or two a day on correspondence and writing manuscripts and fair copies. Dip pens have shrugged off supposed replacement by fountain pens, ballpoints, rollerballs, felt-tips, voice-to-text apps, and a bunch of other clever ideas. They remain the choice of many people who make their livings through penmanship.
Again, your argument is facile and not even relevant to what I've done here. There's a reason the majority of people don't use dip nibs and portable inkwells in daily use anymore. I can take this pen with me and sketch or write with all of my already purchased fountain pen inks without issue, with all the benefits of the dip pen and none of the drawbacks apart from the potential inkwashing power of india inks (though carbon inks from sailor or platinum get close) or the vintage "experience" (which I don't want to minimize, I totally get the appeal of dipping pens, and I have sketched and drawn extensively in the past with traditional dipping. but you can't write ten pages without redipping. And you have to have special inks that can't be used in your fountain pen)
You're making the argument that the typewriter is totally a legitimate way of writing papers. Sure, it's fun and definitely has a use and enthusiastic community, but the argument makes no sense, because while yes, you can totally write using a dip nib, I'm not arguing that this is even the same thing as dip nib writing. I don't see any validity or even reason for your argument. Dip nibs are not dead. Implying that any form of art is "dead" is ridiculous. I'm not comparing my pen to a dip pen, I'm comparing it to a vintage flex fountain pen, it just uses a dip nib, which has all the advantages of a fountain pen, the line variation of a specific dip pen nib, and has the benefit of being able to use your existing FP inks, which most dip pens simply can't use.
So please, stop trying to shove the square peg into the round hole, you aren't even making an argument that's relevant to the discussion.
Edited by Honeybadgers, 05 June 2017 - 06:11.