Transfer Aptos Coin as a Fungible Asset

[0xblockbard]

Hello, most of the docs and code examples show Aptos Coin with the Coin Standard (https://aptos.dev/en/build/smart-contracts/aptos-coin).

However, I've read that it has migrated over to the Fungible Asset Standard, and it's not very clear to me how we will interact with the Aptos Coin using the Fungible Asset Standard.

E.g. legacy coin standard:
use aptos_framework::coin;
coin::transfer(&signer, recipient, amount);

on Fungible Asset standard:
from docs: public entry fun primary_fungible_store::transfer<T: key>(sender: &signer, metadata: Object, recipient: address, amount:u64)

1. can we still use the legacy coin standard in our modules for interacting with Aptos Coin?
2. do we still use use aptos_framework::coin ?
3. how do we get the metadata of Aptos Coin if we use the fungible asset standard?
4. do we still need to support both FA types and Coin types in our modules? or just Fungible Asset types?

[0xblockbard]

ps created in the wrong category. Have recreated here and will close this question.