Trump is banned, but can a revamp save Twitter from itself?

With the ex-president gone, the site is launching a flurry of new features - yet its reputation for abuse may endure

In January, Twitter committed what was at first glance a massive act of self-sabotage: it gave its star attraction, Donald Trump, a lifetime ban. This brought to an end a five-year faustian relationship between the two; some observers wondered if the platform would wither without him, yet, to many, Trump was Twitter's problem writ large.

If YouTube has creators and Instagram has influencers, then what does Twitter have? Few of the words that might jump to mind for regular users are especially positive: there is frequent talk of Twitter storms, Twitter mobs and Twitter pile-ons.