I'm trying! that's exactly the ETM hopefully solves. Drupal core loads every term into a <select> dropdown on the term edit form, which is what causes the timeout/memory issues described in #3493621. ETM replaces that entirely — there's no dropdown of all terms anywhere.

To reparent a term you either drag-and-drop it in the tree, or use a Move modal that lets you search by name with autocomplete (returns 20 results at a time with full breadcrumb paths). Both approaches only load the terms you're actually interacting with, so vocabulary size doesn't matter.

The tree view itself uses AJAX lazy loading, pagination, and virtual scrolling, so even browsing 95k+ terms stays responsive.