Presumably you object to early 20th century theatre posters?
Of course not, Salvatore - and it's interesting to find where it arose - but it doesn't seem to have persisted in common usage since 1912.
When it pops up in the media - e.g Guardian columnist
"Jeremy Vine, hosting Radio 2's music industry debate last night, got a dig in early doors about his hallowed predecessor on the station." it's not adding anything over 'early.'
likewise footballer-speak
"We’ve got to make sure we don’t concede, especially early doors, but I think it’s definitely game on if we score first.
Sporting Life, 3 Jan. 2010."
One definition says 'it's Cockney rhyming slang!'