I feel like “vendor lock-in” is fundamentally different when you’re (a) not paying for the underlying libraries and don’t have to worry about future price hikes (b) can edit and modify the underlying source code to suit your needs.

It also seems like you and I are having very different experiences with how much boilerplate we need to write to get simple programs working. In streamlit[1] for example you can get a dashboard up and running in minutes.

[1] https://streamlit.io/