So, every time someone asks if they should save mythril for 10+1 or pull when they have 5, I see talk of "opportunity costs" and how you hurt yourself in the long term by not pulling now. This makes no sense to me, so I have to ask: am I missing something?
The "opportunity cost" school of thought makes a lot of sense in games like Love Live where there are frequent events with leaderboards attached. If you spend your currency early, you can have better stuff to do the events with, which means you can score higher on the leaderboards, which means you can get better rewards which will only help you perform better on future events, etc. In games like that, the strong get stronger, and spending early is an investment.
As far as I can tell, though, Record Keeper has no competitive element, and that at any given time, there's only a finite amount of mythril available. Let's say there's X mythril in the game (right now, X ~= 72, but it'll change when the event goes live). All players who have logged in 10+ days have access to X mythril. Not all players will have 100% of X; someone who didn't do the elite dungeons might only have 70% of X, but that other 30% isn't going anywhere. Clearing events faster/better doesn't change how much mythril is available. There's no way to get >X mythril, and the only way a player will have <X mythril available to them is by not playing (ie, not logging in and not completing limited time events).
So, am I missing something? All of the content in the game is manageable without rare pulls, and there doesn't seem to be PVP or a ranked ladder, so how does pulling now benefit someone in the long term? What advantage is there that offsets having 10% more relics later?
Personally, I was going to wait to pull until they were featuring a relic I'd want to use, like the the one for Celes or Vanille or Red XIII, but if I'm doing it wrong I'd like to know.