It also allows them to completely gate the feature via tiers, like they do with other things in their environment. I've written about Power Platform since it is a pretty accessible tool for a lot of people. But it is also a shining example of Microsoft's almost microtransaction-like enterprise vision of the future. Everything is great in the preview. While they collect usage data. Then they tuck the most useful and common functionality behind various paywalls, including per usage paywalls. They leave just enough in the base tier to draw people in and get them committed to the platform.
It will not surprise me in the least if basic features are removed and paywalled after the preview. It would not surprise me in the least if they repeat what they've already done and prevent users from using built-in python functions unless the user pays up.