What are the considerations for Skinny Table?

Skinny Table considerations:
1.Skinny tables don’t include soft-deleted rows (i.e., records in the Recycle Bin with isDeleted = true)
2.Automatically synchronizes the rows between the base object and the skinny table.
3.To ensure optimal performance, they contain only the minimum set of fields required to fulfill specific business use cases.
4.Adding a new field in skinny table, contact Salesforce support to re-create table again.
5.Skinny tables don’t get copied over to sandbox organizations
6.Skinny tables are custom tables in the underlying Force.com database.
7.Changing any field type in main table will invalid skinny table, contact salesforce support to re-create table again.