Thank you for agreeing my opinion.
I have kids who downloaded this game.
Although they sometimes play this game
Without a doubt, they don’t know the value or usage of runes.
Unique runes are very expensive to collect up to LV6. It takes a long time.
This is irreversible once you make an unexpected mistake.
And the value of equipment can change, especially when new products are released.
Runes are irreversible.
Unrecoverable big mistakes and feeling of defeat will cause users to give up the game.
Besides, if make it a permanent rune like this, users can always wear it while continuing to strengthen the rune as if it were Forge with Pearl.
In other words, users can collect runes while feeling the heroes that are getting stronger. This contributes to the sales motivation of the runes.