Back in the 70s I was at a college mountaineering club weekend when we had a party with another colleges club. So there were about 30 climbers and backpackers there. We had all our gear with us because it was our cottage. As the only non-drinker I was on bottle opening duty with my fist and the edge of a table because we didn't have a bottle opener between us.
Not what you'd get now, with everyone bristling with multi-tools (which didn't exist) and swiss army knives (which I'd never seen). But shows how none of these are essential to backpacking.
If a trail is well marked and in well watered country do you need a map and water bottle? I had neither on day hikes on the appalachian trail.
simon