v9 ESM-only

[melaniemeindldynatrace]

Hi TanStack team, and congrats on the v9 stable release! 🎉

While upgrading from the v9 alpha we noticed that @tanstack/react-table and @tanstack/table-core v9 ship as ESM-only. This is a change from v8, which shipped a dual CJS+ESM build.

We're mostly curious about the reasoning and future direction here:

Is this an intentional decision for v9, and if so, is there any chance a CJS build could be published alongside? That would help consumers who can't yet fully move away from CJS tooling (Jest in Node mode being the main pain point).
If keeping CJS isn't something you want to maintain, is this a direction you're planning to take across all TanStack packages? The other packages (react-query, react-virtual, react-store, etc.) still ship dual CJS+ESM in their current stable releases, so it's a bit unexpected to see the table packages diverge here.
Either way, it would be really helpful to have this documented in the migration guide. Right now there's no mention of the module format change, so it comes as a surprise to upgraders.

We'd love to understand what the plan is so we can figure out the best path forward on our end. Thanks!

[KevinVandy]

All TanStack packages going forward will be ESM only. Not including this in the migration guides was an oversight though.