Narrative-centered story like Witcher 3 or RDR 2 need some linearity, inevitably.
To make story make sense, some plots are essential. And it enrich the story and people feel it.
Of course goal-centered stories like Fallout 1, 2 , New Vegas, BOTW, etc. can have good 'Story' but I think it's different. Personally I think this kind of stories are dry.
You know, Geralt and Arthur's stories were very heartwarming. But in fallout, yes, It has good story, good background, good characters, but.. I just can't feel emotional thing in this kind of game as I did in witcher series.
Because many elements composing good story, and causing people to feel something must have been sacrificed.
That kind of games want to give players freedom. In result, plots are very simple, story is superficial. (of course you can dig into it but it's so easy to miss for most players)
I love CDPR because their story and character, writing are so good. Plus their game has non-linearity too. not as much people in here want though, but still it exsists. Witcher series are not full linear, cinematic experience. And its balance between story and freedom is perfect for me. I hope they won't sacrifice the story that much for freedom.