Why do we load the default widget classes for all sites?

[pbearne]

Looking at wp_maybe_load_widgets(), we load all the default widget classes for every site

but in wp_widgets_add_menu we check for current_theme_supports( 'widgets' )

I belive we can save resources my moving the current_theme_supports( 'widgets' ) up into the wp_maybe_load_widgets() function

[pbearne]

Duplicate of #55595.

dup of https://core.trac.wordpress.org/ticket/55595
closing
can't fix