To better clear up the Vault 95 issue (SPOILERS AHEAD for all those not wanting to know).
The vault was a test in weening people off drugs. There would be group meetings and the Overseer would be selected annually as a sort of "group leader", who the others would rely on for the most support. All but one of the members was an addict. This secret member was a Vault-Tec employee, who knew the location of a secret stash of drugs (described in another terminal to "last a lifetime") and would unlock this stash in 5 years, and just leave it to be found.
After the 5 years notes show clear progression from many people, but the moment drugs are re-introduced, some grabbed what they could and ran to get high, while one individual barricaded himself in his room, his personal terminal showing a slow progression of wanting the drugs, and how the outside is affected. The Vault-Tec employee is assumed to have died quickly, as he was ordered to make weekly reports after revealing the drugs, but only ever made a single report stating he was about to unlock the stash.
Some notable things about vault 95
The room with the terminal of the man recording the chaos outside, and mentions barricading himself in, has a wall that was clearly broken through from the inside. With his door still blocked, this shows he literally broke down a steel reinforced wall to "be with his friends in his final moments".
The Overseer's room is clearly where people met for their anti drug meetings, however, skeletons are also found here, suggesting that in their final days, the remaining living members (after gunshots were heard) came to this room, and overdosed together.