That is exactly what it is like!... Earlier on I stopped at a settlement to save the game at a bed then went to clear out Corvega assembly plant. I sneaked all the way through stealth killing everyone without being seen. Then I got to the big room with a few legendary enemies in it.. I'm thinking ****, that is half an hour gone now! Then I went over to a desk and inside was a recordable holotape

They are spread inside containers with a chance for them to spawn. You can go ages without picking one up(especially I find when you also have the Brotherhood technical documents spawning in containers) or there might be a dungeon with 2 or 3 in it. It works really well.
I upgraded the pistol perk and found I was one or two shotting most raiders quite early tbh, though now at level 35 they are a bit tougher. I am geared to end fights quickly though, with all sneak, pistol and sandman perks, so I can kill most things from the shadows quite quickly.