The original vanilla-faithful bookshelves in inspirations seem to have been replaced by shelves. Is this configurable at all? Several people have expressed a strong preference for the original bookshelf model.
New:

Original from github wiki:

• Minecraft: 1.16.5
• Mantle: 1.16.5-1.6.157
• Inspirations: 1.16.5-1.2.3.38

Shelves are bookshelves. Dislike the model? Change it. Just know that the new model holds 2 more books than the old one so there are really 0 disadvantages.

Ah, feature, not a bug. #239
The question for original models remains!