The 9 pages of the flight plan, will be read through, though the detail of the ATC plan and the nav plan aren’t relevant at the pilots‘ planning stage. They’re checked on the aircraft, when the ATC plan will be checked item by item against the route that has uploaded to the FMC. The total distance calculated by the FMC will then be checked against the total distance of the nav log. A tolerance of 1 nm is all that’s allowed.
The NOTAMs come in three parts, weather, important items, and a less important section. That separation has never worked well, with trivia ending up in the important section, and vice versa. Everyone reads through every item of the weather section. I used to detail an SO to each of the other parts.
The problem is that by including so much that really isn’t relevant, items that you need to know can be hidden within the dross. This has been an element in incidents around the world, with the general conclusion being that NOTAMs are written to exonerate regulators, with no consideration to how useful they are. For instance, many Australian ones would reference ‘work plans’ when talking about airport works, but without the actual work plan, they really told you nothing. But, the buck has been passed…