No, and no. As to your first comment, I did not suggest expensive headphones are now useless. The focus of my post was entirely on the analogy between this change and the change from 30-pin to Lightning.
As to your second comment, it's simply incorrect. Use of an external DAC via the Lightning port can be an excellent option, and it can have sonic advantages over the headphone port. I have purchased several DACs over the years precisely because of the sonic advantages. However, that capability already existed with the Lightning port. If you had an external, Lightning-compatible DAC, you could do everything pre-iPhone 7 that you can do now, and with all attendant advantages. Removing the headphone jack doesn't create the benefit you cite.
Finally, don't assume my post meant more than it does. I like Apple, I very much like the iPhone 7, and I'm planning to buy one. I also recognize that removing the headphone enabled the haptic engine (or at least made that possible without additional compromise), so I understand what was involved here. But let's not pretend Apple's decision came at no cost.