From what I understand our purchase of server boosts is only a temporary buff to the server. ... If that server dies, the permanent boosts will just die with it. As it is a permanent boost to that server, people can not cancel it or transfer it to whatever new server they like better.

How long do discord boosts last?

A Nitro subscriber can boost one server at a time. Once a server is selected for the boost, the user will be notified that they cannot boost another server for seven days.

Do discord nitro boosts expire?

Losing boosts

The server will lose boosts when a server booster either moves their Boost(s) to another server, or their Nitro/Boost subscription expires. Servers have a "grace period" of 3 days before they actually lose the level in case the booster forgot to renew their subscription or similar.