I was on a 5-hour redeye flight with United Airlines, and the constant announcements made it nearly impossible to rest.
It felt like every 10–15 minutes there was either a safety reminder, a credit card promotion, or repeated messages about items in the cabin. Instead of consolidating information into fewer announcements, the crew kept interrupting the flight throughout the night.
On a short overnight flight where most passengers are trying to sleep, the frequent interruptions were extremely frustrating and left very little time to rest.