SPHttpClients vs AadHttpClient vs MsGrpahclient

[mvcsharepointdev]

When developing SPFx we are left with many technologies to be used. mainly i am trying to understand when to use each

SPHttpClients vs AadHttpClient vs MsGrpahclient

now i know the SPHttpClient can be used to integrate with SharePoint but since it uses SharePoint REST API so it is considered as legacy approach, since Microsoft is not adding any new features to SharePoint rest api and it is replacing it by graph api.

so i have these 2 questions:-

1. If we want to perform CRUD operations to SharePoint lists using non-legacy approach, which class we need to use?

2. also if we want to integrate with Graph which class we need to use AadHttpClient vs MsGrpahclient? and why.

Thanks