One thing I'll put in the estus flask corner is that it's a consumable which sees significant usage, most RPG consumables do not — either because you are saving them for when they're needed, too situationally useful, or just not powerful enough to be worth using. The estus flask mechanic completely removes the first issue by replacing it with something akin to Vancian magic — charges per rest, you are encouraged to use it because you are aware of how plentiful the item is, there is no hidden information.
OTOH, sometimes consumables just become too readily available — loading up on potions at a shop, you have all the benefits of the estus flask(no hidden information of whether you will acquire more, etc.,) without the drawback of having charges that can only be replenished at certain areas.
What's the opinion on this?
Are you aware of any non-dork souls/soulslop games that use a similar mechanic? What about with things other than healy potions?
[edit to correct myself]
Estus Flasks do have hidden information in when you won't find the bonfire, but you know at some point you will replenish your flask.
