Most people spent 15 minutes making bad PPTs in the past now they spend 5 minutes asking ChatGPT to create one. The presentation/meeting will take the same 2 hours where most ppl will get bored.

This "productivity" gain changes nothing. Software already optimized most of it in the past 20 years, the gains now are marginal, at best incremental.

I’d argue productivity is declining in this context.

The PowerPoint object is meant to be a package of one’s insights. If those insights are of zero value (the less time you spend the less value - correlation) - that time expended is a net negative for he firm’s productivity.