benefit of multiple tomcats on single host moved to docker containers?

Is there any? We currently have 6-8 (and soon to be more) tomcats running on a single VM with Java 8. There have been some memory issues in these apps before before. I am looking to potentially re-architect this to actually use one tomcat instance and have deployments managed through the UI so I dont have 8 separate tomcats with different memory settings, configurations, and the likes. This is also a pain to manage because there is a convoluted way we have setup to manage each tomcat instance

There is also benefit to having a tomcat per app - like being able to restart tomcat without knocking all apps offline

That said, would moving them inside docker be beneficial? I see benefits on each side