Can Twitter turn stagnation into progress, or has it hit the wall?

User growth stalled, abuse was rife - but will it be able to break through in 2016?

In 2015 Twitter lost one chief executive, gained another, and nearly tossed them too, before eventually settling down with him - incidentally, one of the men who had founded the company way back in 2006.

It also finally admitted that it sucks at dealing with abuse on the site, made its first tentative steps from "platform" to "publisher", and began testing the most controversial new feature it's ever introduced.