How long does passport control and visa on arrival take at Sharm el-Sheikh airport?

Arrived and departed on Nesma Airlines flight NE-648 (regular flight, charter fare). No questions asked at passport control. Stay was under 28 days — no issues whatsoever.

Question raised: if a flight is significantly delayed and you arrive after midnight, can you still buy a visa on arrival? Based on others' experience, visas are sold late at night, but worth confirming in advance.

Arrived at 9 PM and purchased a visa on arrival. No queues at all, even though multiple flights landed at the same time. Luggage was already on the belt by the time passport control was done — zero waiting.