What will happen to Planning Allocation Rule after 24A release?

Summary:

Hello All, 

Multi-level allocation will by default enable from 24A release onwards. Which means, instead of Planning Allocation Rules, we must have to use Supply Allocation Rules as like in Backlog Management. Will single level allocation work after that release? Regards, Binoj

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

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