Sunset this plugin

[GaryJones]

WP 5.5 added lazy loading for images and WP 5.7 added lazy-loading for iframes.

This plugin's readme suggests that it supports back to WP 3.2, though the latest PHPCS config suggests only WP 5.5 will be checked.

As the feature has been in WP core for about a year (and arguably now more battle-tested than the implementation in this plugin), I think there is a valid argument to sunset this plugin, rather than spend time on improving it only for those who haven't upgraded WP yet.

[trepmal]

My notes around here somewhere have this same question - does this plugin have value today?

I wouldn't mind getting a proper comparison done to determine what if anything this plugin does differently (better/worse?) than the Core feature and document that in the readme.

Maybe add an admin notice if activated in a 5.5/7+ install.