This is beneficial for front-end forms as the Meta Box field css files are mostly very small; inlining them reduces the number of http requests.
I added the attribute to all styles for constencies sake; some of them will probably never be inline unless someone uses the 'styles_inline_size_limit' filter to increase to maximum size of inlined styles.
By adding the path attribute to registered/enqueued style it allows WordPress to print some styles inline: https://developer.wordpress.org/reference/functions/wp_maybe_inline_styles/
This is beneficial for front-end forms as the Meta Box field css files are mostly very small; inlining them reduces the number of http requests.
I added the attribute to all styles for constencies sake; some of them will probably never be inline unless someone uses the 'styles_inline_size_limit' filter to increase to maximum size of inlined styles.