What a week. Markets ran for cover as fears mounted that artificial intelligence (AI) could render many software business models redundant, or at least sharply devalue them. The issue was compounded by the fact that many of these software names were trading on lofty valuations in the anticipation of unrelenting growth. The potential risk of contraction compared to expansion has seen numerous household names halve in value over the last 6 months, from Xero and WiseTech on the ASX to Atlassian and Adobe in the US.