[jeffbarg]

It's interesting that they are explicitly not committing to holding the API constant (which seems quite common & expect for a "1.0"). I generally like that philosophy, but I wonder if it will lead to some unexpected whiplash in the future for people now expecting the core to be stable.

[milliams]

It's a bit unclear in the docs, but I think what they're saying is that if there's a need for a breaking change, they're "not afraid to release version 2.0", rather than saying they're "not afraid to make a breaking 1.x release".

[fbdab103]

Polars is already effectively Pandas 2.0 with a lot of lessons learned. Hopefully, there is not too much additional churn.