Who knows if it did or not. That's speculation. When they went that way, it got canceled. That we know. We also know that episodic sci-fi is well known to be extremely successful. Trek, Buffy, Stargate, which blows everything away. To me it appears to me a more successful recipe. But as you said earlier, streaming may be having a role in the new shows and you're probably right.
Well, we may not know the full conclusive rationales behind it but there is an assumption here that going to serialized immediately equals cancellation. For starters, and I don't have the charts but I know others have posted them, there was an overall downward trend in Trek viewership, and Enterprise followed that trend. In fact Enterprise was losing viewers for its first two or three seasons and in Season 4 were finally gaining viewers.
The challenge here is the assumption that episodic equals success, and serialization equals failure. Except, there are so many other details at work, including how the story is presented. Certainly Stargate SG-1 did serialized storytelling, and follow up stories, as well as episodic, and was successful.
Now, I can appreciate the preference behind episodic vs. serialized. But I don't think one automatically equals to success even in Star Trek. I also think the danger is that assuming episodic will work means that it becomes more formulaic, checking off boxes, that led to Berman era's Trek downfall to begin with. It was stale, and predictable. Even VOY, who's set up offered a great way to combine both episodic and serialization, failed and just went back to the TNG formula.
And, maybe that formula sounds really warm, familiar and appealing. I think that might very well be part of Trek's appeal is that it is viewed as comfort food view; unchallenging, consistent and the same. Maybe that's the point I'm always missing when it comes to how people don't enjoy current Trek. I genuinely don't know at this point. I do know that Trek set out to entertain the largest possible audience and would change itself as needed to match the times. I think that following in to formulas and past successes to guarantee future success is not a winning plan.
I could be wrong. But, I don't think the shift to serialization was what put Enterprise down.