I think everyone needs to think long term. Yes a development cycle takes time, but take a look a year down the road.
SMF as a forum is not perfect and there is many room for improvements. The kind of user features and interaction developers are discussing are very exciting.
I would rather take the longer haul and have some awesome software than simply stick with the norm. Afterall everyone has to start somewhere. SMF itself was created out of desire for change,. 
In general I agree, however it creates a dilemma for me and I imagine I'm not unique/alone.
Currently on 1.1.11 I have found the antiquated look and functionality of SMF1 to be a deterrent to many potential new users to my forum. I was hoping to be on SMF2 by now. With development on SMF2 ground to a virtual standstill due to the political drama, there's no telling when I might be able to upgrade to it (when will RC3 arrive with most of the developers gone? Or SMF2 final?) And then when (if) SMF2 is finally released, that also doesn't address the fact that most mod developers are also boycotting the project for the time being, due to dissatisfaction with management. Many of the mods on my forum are "make it or break it" mods which help distinguish my site from the competition. If I were to abandon too many because I was forced to accept only what features were in SMF2 core, I would have a hard time retaining my existing users and acquiring new ones.
I hate to imagine having to settle for SMF1 or SMF2 RC2 for 1-2 years until a "Phoenix Forum" 1.0 is produced. My site will feel dated and locked in the past, and I will leech users in the interim. I'm happy to ultimately have a better alternative, but in the meantime I need some sort of continuity to keep me relevant in the modern forum user-market.
I would hope that improvements, features and interactions people have in-mind could be incorporated into SMF with proper evolution, development and release continuity. It isn't always necessary to replace your car in order to get a new car stereo.