I feel like the DS launched at the perfect time, before the touchscreen phones took over. They probably wouldn't have happend that early without the DS.
The Jaguar had a bad launch because IBM only shipped 5000 consoles instead of 1 million and thus they didn't have the money to save the company. Delaying the console would have closed their doors and IBM failing meant they shut down anyway. This failure led to the rushing of the CD addon and the lack of an updated controller and the loss of Rayman as an exclusive mascot.