Went through Changi in July and colleagues have been through more recently than that.
My stop was 6 hours and we were held in a closed off pen area in the terminal with no access to the shops/restaurants which were all closed anyway. Facilities available in the holding area were minimal, a pop up coffee shop and some vending machines. Colleagues that have had a 8hr+ stop were booked into hotels so were escorted off the aircraft and straight to the hotel and collected again for onward travel. Work paid for the accommodation.