@csf & @Davis. Thanks for putting the word out, that probably many people had on their mind. I recently setup a new forum platform, and was facing the same issue: should I trust the development or go for something that is mature and actively developed, but not fully to my liking.
I have been following Flarum for some time, while leaning towards NodeBB and Discourse, mainly because those systems are mature and the only other two (in my opinion) that are worth looking at as candidates. The thing that made me eventually choose for Flarum was:
Simply: I just like it so much, and very important - it works GREAT on mobile.
Secondly, I know the team can do it, as they got this far and warned everyone it could take a while. Looking back at the days of phpBBv3, which took I think 3 years or so, the delay of 3 months is still very acceptable.
Thirdly, I think there are some great programmers aboard, that really can make a change. Even very young ones, that have more time and a lot of dedication!
But agreed with @csf, Toby And Franz should perhaps change the roadmap and let certain core parts be done by other Team members. It has been proven many times in the past that you can only move forward if you work as a Team!
So there, my two cents! (If anyone was waiting for that). I am using Flarum, and I like it. Yet, I really hope my guts was right by choosing Flarum against all odds (And
yes, I know Beta software should not be used in production, but like many people probably agree with me: this Beta feels more stable than some systems that have been out there for years).
Anyways, thanks all for the hard work, and hopefully the core team will make some adjustments to the roadmap and divide work among other Team members, so some of those that worked on Extensions, will not have the feeling that all might be for nothing in a few weeks or months. The community is the key to success behind a product like this!