⚠ The Cohort ShiftLow threat

A network effect defends the present magnificently but says nothing about who joins the network next, and the quiet danger to Office's compatibility grip is generational. A large share of schools and universities now run on Google Workspace, free or nearly so, which means a whole generation is learning to write, calculate, and collaborate in Google's tools rather than Microsoft's. They arrive in the workforce fluent in a different grammar, and every year that cohort grows larger.

The threat is slow but cumulative. The compatibility network holds because everyone uses the same tools; but 'everyone' is not fixed — it is replaced, a graduating class at a time, and if enough of the incoming workforce prefers and expects Google's tools, the default Microsoft has enjoyed for a generation could soften. Networks that took decades to build can, in principle, erode the same way.

The counterweight is that the corporate world remains overwhelmingly standardized on its tools, and new hires adapt to the employer's software regardless of what they used in school — a young analyst raised on Google Docs learns Excel on the job because that is what the firm runs on. The compatibility network's whole point is that the individual conforms to the group, and in business the group is still Microsoft.

File it as low-to-moderate, on a horizon of years. The cohort shift is real and worth watching over decades, especially if Google's foothold in education ever translates into the enterprise — but the cohort most exposed to Google's schools is the one buying Microsoft 365 Consumer, and that line grew 24% last year to $9.2 billion¹ — the network has a powerful way of assimilating each new generation to its standard rather than bending to theirs.