In #2073 (comment), we discussed whether we should keep the Post, Term, … functions in Twig:

For the API in Twig, we still have Post, PostQuery, etc. For consistency, should we consider renaming these functions to get_post(), get_posts(), etc?

I think renaming and deprecating the old Twig functions is probably a good idea. Seeing "Use Timber::get_posts() instead of new Timber\PostQuery()" and then a paragraph later seeing "You can also use PostQuery in Twig" is a little jarring, and it's one less thing for new users to have to remember.

This is about the following functions in Twig:

This leaves us with the following todo:

• Deprecate Post, add get_post()
• Rename PostQuery to get_posts() (no need to deprecate, added for 2.x)
• Deprecate Term, add get_term()
• Deprecate User, add get_user()
• Deprecate Image, add get_image()
• Rename Attachment to get_attachment() (no need to deprecate, added for 2.x)