There is virtually no storyline as far as i got into it, no details on how to use shit really. I ended up watching a play through and tried to get the jist of it all and the endings suck ass turning into a fucking slug for one of them. People talk about "the lore" but one shouldnt have to dig into every orifice to find everything. Sekiro was better in this regard somehow and there wasnt much to sekiro either.
The atmosphere is great and why i wanted to play it but it fell short for me.
Watching a playthrough in these is pointless, if your goal is to understand why people love these games so much. You have to experience overcoming the challenge yourself. It's more than just getting better, it's the fact that every enemy, regardless of your level (unless you are way OP) poses a danger if you get sloppy, soyou always have to be on your toes. The mechanics give weight to these encounters. It becomes an incredibly visceral experience you have to feel yourself.
The storytelling method in this isn't something I would have cared for either, but when you stop and look around, it's right in front of you, always told well environmentally. I grew to love the method, as your blood gets boiling so much that you rarely want to stop for a prolonged cutscene.
You get to pick and choose when you want to absorb more of the story, either by examining the world more closely, or reading the item descriptions. Piecing it together yourself makes it a unique experience for everyone. The countless well thought out, and highly produced Youtube lore videos, or reddit posts, are even bigger rabbit holes. It's fun comparing your experience with others, as the lore is so rich.
I've mentioned before that Code Vein took a different approach to item descriptions for lore. Instead of just simple text, you got to play through interactive cutscenes. It wasn't perfectly executed, but the fact you could do it on your own time was cool. I'd like to see that expanded upon. I love well crafted cut-scenes like in Witcher 3, or TLOU and MGS. There's no reason that can't be brought into the fold too, it's just needs to be something you can execute on your time.
There's generally only music for boss fights and certain rest stops, so it becomes very immersive. It's just you and the world around you for the most part, so It becomes your journey as much as any of the legendary RPG's and immersive sims out there.
Like anything, it's not going to click for everyone, but you can't understand why it does without first hand experience.