Reasons:
- Debian is starting to ship this version in Trixie (https://packages.debian.org/trixie/capnproto), which will likely become the version shipped with Ubuntu 24.04 LTS. So testing with this version will help to find any issues before real users start to use those distro packages.
- The feature is currently experimental, so bumping the version shouldn’t cause any production issues.
- With multiprocess begin a priority project for 27.0, it seems better to do build system changes/bumps early, rather than later, to allow for more time testing them.