Scald is too heavy, isn't it?
Scald is modular, thus it contains many sub modules. If you don't want a feature, just disable a sub module and replace it with your drop in.
Look at the size (as of Oct 1st):
||Included: YouTube, Vimeo, Dailymotion, Audio/ID3, Flash support
|File Entity 2.x + Media 2.x
So, no, it is not at all heavy as you may think.
I think Media is the de-facto standard solution
A solution used by more than 100 K website can't be wrong. But we believe we need another solution because Media's approach is not extensible. Media implies a media is a file, Scald does not. Scald believes file is just a special case for a media entity. Those both approaches are not compatible and we can't fix Media. The Scald team thought carefully about many possibility before deciding to port Scald to Drupal 7 (to be based on File Entity or Scald's own entity, which is known as "atom"). Amongst reasons why Media Atom entity is not File entity: