TaxonomyLoadTree - cache not invalidated when adding new terms

When using `taxonomy_load_tree` the resulting cache contains `taxonomy_term:` for each matching term. This doesn't make sense since this producer ~~never accepts any ID arguments~~, meaning the cache will be stale unless you edit an entity in the original result set.

Since 8.x-support has been dropped, couldn't this producer result simply be cached by `_list:` without any major impact?

EDIT:
Case of the mondays, it's possible to pass a specific term ID (parent). But I don't think it changes much in context of cacheability - if I add a new term underneath a parent, unless it forces clears of already existing terms, it's still the same situation.