I've got a habit of uploading "full size" images directly from my phone (12MP) or Camera (16MP). I also have some full size panoramics that can be up to 10,000 pixels wide.
Obviously these files are HUGE but I rarely use the "full size". I recently used WP Smush to optimize my thumbnails. However, I'm wondering if I should resize my entire image library to a more managable usable size.
The question is... How large of a file should I upload? What resolution?
I want to keep my site "future proof" and I know once 4K displays become the norm all of these 1080P images will look teeny tiny.
Thanks for the advice!