We're going to need to bump Go to 1.26.2+ in order to merge #2336. We try to stay on the oldest version of Go that's possible, but this is a good reason to upgrade.

Updating the main module to Go 1.26 will allow us to remove a bunch of sub-modules. We only need two sub-modules to keep tests and examples from leaking dependencies into the main module, and that would be /examples/... and internal/test/....