Migration to modern UI from classic UI in SharePoint Online

[Aki Kanno]

If you have reference information, please provide and advice me.

1. Function mapping sheets between modern UI and Classic UI
2. What is a migration impact to developers

3. Detailed area of influence on Migration
4. Important points to be noted when migration to modern UI to classic UI

Thank you,

Aki

[#2]

Hello Aki,

I think below utility may help you understand the impact on your current site - 

https://github.com/SharePoint/PnP-Tools/tree/master/Solutions/SharePoint.UIExperience.Scanner

Thanks & Regards,

Bhanu