Useful Drupal modules
Click on the module name for notes, comments, patches.
Recommendations (for and against) are my personal opinion only and may be out of date. Feel free to email with corrections/suggestions.
Why haven't you mentioned Drupal 9? As of December 2021 I've updated most of the sites I look after to Drupal 9 (experience: mixed). I haven't decided how to label future version compatibility as D10 will be coming soon as well. The upgrade_status module is superb. You're bound to have issues with composer. Also watch out for a nasty session headers bug with redirect_after_login.(1 modules in list)
|Name||D8||Personally Tested||Last Updated|
|Image Lazyloader (lazyloader)||✔||✖||2017-02-27|
Images are hidden until they scroll into view. Can specify distance before loading is triggered, also placeholder image, loading GIF and any pages to be excluded. There's been some Drupal 8 development but unclear how complete it is.