Bloating, via Base64 images Posted by thatonecoderguy on Monday February 13, 2017 @07:12PM from the csswizardry.com dept. https://csswizardry.com/2017/02/base64-encoding-and-performance/ ( 2 comments | 11 points | on HN )
HTTP/2 should make "number of assets" less of a problem, since it no longer drives multiple connections, assuming all are from the same site/domain.
Edit: Bloated JS and parse time might be the right contender to replace "number of assets" if you want to point to the top 2 current issues.