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Changes between Version 1 and Version 2 of Ticket #32474, comment 22

v1	v2
6	6
7	7	I meant that if core stops using options for saving the widgets data, the existing `pre_option_*` filters will never run, so all plugins that use them will break. And there is no way for core to add backwards compatibility to prevent that breakage. Of course the authors of these plugins will probably update them if/when that happens, it's just that using low-level filters for commonly needed tasks is not a good idea :)
	8
	9	Also, if we had new filters, we could pass either simple arrays or `ArrayIterator` objects without any back-compat concerns (see below).
8	10
9	11	> ...plugins now have the ''option'' of filtering the `widget_{$id_base}` options to return `ArrayIterator` objects instead of intrinsic arrays, and `WP_Widget` will handle them successfully.