No one can buy Canva now. Adobe, its largest rival, inadvertently put paid to that with its attempt to acquire another design software firm, Figma, that collapsed this week. The $US20 billion ($29.5 billion) deal, struck 15 months ago, crumpled after regulators in three markets said or signalled they would block it. If they were that worried about an Adobe-Figma tie-up, they would be aghast at the prospect of a software giant buying Canva. So that’s a non-starter.