Ah, one more. On the community:
Unfortunately, I can’t say the NCS community is big. If you have any issue you google it and the first result (and the most relevant one) is the Dev Zone forum, where usually an engineer or a company representative has a specific problem. So, I can’t say, that they have lots of topics on all the possible problems, like Arduino community has. However, I believe there’s a prerequisite: if you deals with NCS you are at least at some level of engineering confidence, to investigate the issue yourself with minimum external knowledge/help.