@pintoch@mamot.fr I agree that portability of query files is rather low, but it varies. Pulsar (the editor I work on) needs more detailed highlighting than what highlights.scm tends to provide. But we made sure that our integration with tags.scm is compatible with the standard syntax.
On the whole, sharing of “glue” is less of a concern to me than ensuring popular parsers are maintained and that some incremental progress is made toward addressing Tree-sitter's biggest drawbacks.