Amazon - no more 1 day delivery?

Just noticed that all estimated prime deliveries are now 48 hours rather than next day. I've checked through some popular items that was delivered on the same day if it was ordered in the early mornings

Also noticed general slipping in delivery schedules once the item reachs the local distribution centre too

Has anyone else noticed it? What is the reason behind it? Lockdown? Overload in demand? or cost cutting measures