Huge number of ir-relevant Journeys in Production

Summary:

Hello All,

Today, in Production there is a huge number ( > 26396) of active Journeys checklists that are mostly irrelevant
as most of the colleagues to whom the Journeys have been assigned have all already left the business.

We would like to know if there are any performance issues or any other issues if such large number of Journeys remain open/not closed by the terminated colleagues?
Version (include the version you are using, if applicable):

25B

Code Snippet (add any code snippets that support your topic, if applicable):