[Very Important] Read in details if you’ve written a plugin or themes, that stores term IDs in a static way, you’ll be affected. Out of top 100 most popular plugins on WordPress.org, team found 11 will need changes in order to anticipate term splitting: Jetpack, WordPress SEO by Yoast, Google XML Sitemaps,All in One SEO Pack, Mailpoet, Advanced Custom Fields, Ninja Forms, Types, Custom Sidebars, Paid Memberships Pro, WordPress Download Manager.