Should I be a card hoarder now that there's no GST?

So far I have...
Maybank 2 Card - For weekend spending that don't apply to other categories
Maybank MCard Ikhwan - For Petrol / Groceries (Fri Sat)
HLB Wise - For Petrol / Dining (everyday)
CIMB Cash Rebate (Application) - For groupon / lazada / buy bus ticket / online stuff

AEON Watami (Thinking about it) - For all other transactions that don't apply to above categories on weekdays and also places who don't accept AMEX which is quite often.