I think the truth of the quoted statement hinges on the value of "mainstream". Yes, I've read articles that say the death of Toys R Us, et al. was due to a vari

I think the truth of the quoted statement hinges on the value of "mainstream". Yes, I've read articles that say the death of Toys R Us, et al. was due to a variety of factors including financial manipulations, but certainly a lot of articles and TV news went with the "Well, Amazon killed another store" simplification.