PNF calls "1000' to go" prior to level off at selected FL/Altitude and PF acknowledges. Usually the aural warning gets in the way.
On the 737 Classic the altitude alerter sounds at 900 feet to go to the selected MCP altitude. On many occasions the PNF's wait until the alerter sounds and then belatedly sing out "Thousand to Go." A bit bloody late, Mate.
Have even heard a PNF call "thousand to go" when the chime sounded because the aircraft had left a level for a new level but the crew forgot to select the new level in the MCP and the chime sounded when the aircraft had climbed 300 ft above or descended below current MCP altitude. Monkey see - monkey do, comes to mind...
In the simulator, if the instructor quietly disables the altitude alerter to check the alertness of the crew (without telling them first) invariably the PNF forgets to call "thousand to go" and the PF forgets too. Which means neither are monitoring the altimeters. Observed this slack attitude on countless occasions which means crews rely blindly on the alerter sound to remind them of the approaching altitude rather than have the situational awareness to closely monitor climb or descent rates to selected altitudes