Making friends is not the mission of LW 2.0. However, right now the 2017 survey is investigating what demand there is for a site which does have that as its mission.
As for the largest diaspora community, this is a question which was investigated in the 2016 survey: http://lesswrong.com/lw/nor/2016_lesswrong_diaspora_survey_analysis_part_two/
In general summary:
The largest diaspora community is SSC.
LessWrong was actually still bigger than Tumblr by a smidgen.
Making friends is not the mission of LW 2.0. However, right now the 2017 survey is investigating what demand there is for a site which does have that as its mission.
As for the largest diaspora community, this is a question which was investigated in the 2016 survey: http://lesswrong.com/lw/nor/2016_lesswrong_diaspora_survey_analysis_part_two/
In general summary:
The largest diaspora community is SSC.
LessWrong was actually still bigger than Tumblr by a smidgen.