There's a big difference between a developer grudgingly keeping a cheap headless mini-computer under a stack of papers somewhere that gets used only as needed, and a developer using your system as their "home base" and buying into your entire ecosystem.

This only holds true if you consider lock-in IMO, e.g. you need a mac to develop iOS or mac apps, or you need a windows machine to develop windows apps.

Otherwise I don't care which browser you are using to look at my pages, or which Desktop to run my qt app.

There was a massive influx of developers switchting to mac laptops before it was popular with a majority of users (around 2008).