I think my latest FOMO card is Amex Plat Travel. Applied last week, it's shipped and I am waiting for delivery early next week.
Could I have used my existing cards itself and not going for another card?
Could I have survived without an Amex card? Will it be a regret or benefit - I will come to know only later after using it for a while.
But all in all, the recent changes in my card usage and strategy have been driven by moving away from cashback cards and more towards milestone based points and rewards cards. As long as I can redeem them for a good travel, it should serve its purpose.