Well that's Mr Silva's luck run out!
Even Simon Jordan is backing him to stay at Watford :shootself
http://www.watfordobserver.co.uk/sport/watfordfc/watfordfcnews/15659975.Silva_should_stay__says_ex_top_flight_chairman/
The Watford way is that the manager comes in and fits in with the rest of the staff, that are already in situ.
If they don't fit in, they go.
Stability for the club, I guess?
It's a hell of a list :shrug:
https://www.oddschecker.com/football/football-specials/everton/next-permanent-manager
OR
https://www.grandoldteam.com/forum/threads/next-everton-manager.99329/page-662