First of all, quite a few people (including myself) have observed streaking with C41 when we didn't use a stop bath. Second, C41 was never intended for home use, but for big professional labs, where time on a machine equals money. Anything that could reduce processing time by a minute was worth a lot of money.
Exactly. And, the developing time is just as long as it needs to be.
For home users, there is instruction for how to develop the film at lower temperature, necessitating longer development time.
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