Something to mull over in a busy environment .
If you have to divert to your alternate due Wx chances are so will a lot of others.
So you all arrive at the already busy alternate along with a gang of other folks who have also filed for the same alternate.
Best you have fuel to hold for a considerable period while awaiting your expected approach time.
A friend told me that once he got involved in this scenario as aircraft diverted from 3 airports to the only available alternate. The chaos was incredible. One runway, non precision approach, heavy rain showers, very surprised and rapidly overwhelmed ATC and “supposed aircraft Captains” as he called them.
The crowning glory was “The Nation’s Airline” showing up and “ The Nation’s ATC” clearing him #1 for approach when he was 40 miles out when there were 4 aircraft already holding overhead.