ISTR (I worked there over three years ago) Growth rate spikes after new versions are released, The 2012 jump is Basecamp 2 and that really moved the needle, and

ISTR (I worked there over three years ago) Growth rate spikes after new versions are released, The 2012 jump is Basecamp 2 and that really moved the needle, and late 2015 is Basecamp 3. There's interest and publicity and articles and stuff, and that trails off to a more "normal" growth rate. The leveling off you see from 2016 to present is likely an artefact fo this, the longer term growth rate is probably approximately a line fitted to the graph from 2012 and onwards.