I posted my thoughts on this a while back here, but to summarize:
- You have a better chance of getting an answer from MDG themselves who watch and post via this forum way more than they do SO.
- It’s much easier to link, cross reference, embed, share, etc. answers from threads here with other threads here (helps when answering questions with previous answers).
- I personally find searching through the centralized Meteor knowledge in this forum to be much easier, and provide much more relevant results, than searching through SO.
- A lot of posts here start off as technical questions, but then branch out into really interesting technical discussions that help contribute to the overall health of our community. SO really feels a bit direct and cold when it comes to this area.