@JohnnyO - When you refer to the iKon slant, do you mean the stainless head that was available plain or with a DLC coating and now with the B1 coating? or the iKon X3 (aluminum)? or the iKon 102 (also aluminum)?
@Hourwerk - I think anyone who makes anything will pay attention to marketing issues (I once did product marketing), and that can include trivia ("Exciting new colors!") as well as substantial improvements that improve the quality of the product and the customer experience. Indeed, the desire to make a product more appealing, more useful, more likely to be purchased and recommended drives a lot (most?) innovation. But as I tried to emphasize in my original post, many (including me) find that a slant that works well for them does indeed offer a noticeable improvement over even very good regular razors. I quoted one shaver who had 8 years experience with regular razors. However, as I also emphasized, nothing in shaving works for everyone, and if something doesn't work for you it's often difficult to believe reports from those for whom it does work. I still see remarks from men for whom a particular brand of blade did not work strongly recommending that others not even try that brand, and suggesting that it be removed from the sampler pack and discarded. (The "bad" brand varies from person to person.) They are unable to believe that something that doesn't work for them could possibly work for anyone else. Most, however, recognize the rule of YMMV in shaving (and in much else—comedy, for example: a comic who's hilarious for one may fall flat for another).
@Missoni - Yeah, the 39C didn't work for me either—because of the handle, not the head: the 37C works fine. Right now there are several razors using that head design, and the
RazoRock German 37 uses the head in a three-piece design and sells the head separately so that you can provide a handle that you like.
@PickledNorthern - I also didn't like the 39C, but there are other slants and, just as with regular razors, some work for me and others don't. I wouldn't give up on slants because a particular model didn't work for me, any more than I would give up on DE shaving because a particular DE razor didn't work for me.