how to migrate content from one drupal 8 site to another drupal 8 site

The big question is why are there are no great migration-based modules for more quotidion moving of content around and instead so many not-great modules for moving content around (the best is Single Content Export for content and Structure Sync for taxonomy, menus, and blocks but i started looking for migration-based solutions again after we ran into a sort of basic bug with hierarchical vocabularies that we know migrate module would never have).

Places to provide answers:

Some links as of late 2023, Entity Migrate Export is the closest but it generates custom modules for you— maybe that’s the answer, migrate system really expects custom modules to be doing the work?