EIP-2681: few minor updates + move to review (ethereum#3130)

EIPS/eip-2681.md

@@ -3,7 +3,7 @@ eip: 2681
 title: Limit account nonce to 2^64-1
 author: Alex Beregszaszi (@axic)
 discussions-to: https://ethereum-magicians.org/t/eip-2681-limit-account-nonce-to-2-64-1/4324
-status: Draft
+status: Review
 type: Standards Track
 category: Core
 created: 2020-04-25
@@ -15,12 +15,11 @@ Limit account nonce to be between `0` and `2^64-1`.
 
 ## Motivation
 
-This is motivated by Eth1.x / Stateless Ethereum discussions, more specifically discussion around the ["witness format"](https://github.com/ethereum/stateless-ethereum-specs).
-Introducing a restriction would allow storing the nonce in a more optimised way.
+Account nonces are currently specified to be arbitrarily long unsigned integers. Dealing with arbitrary length data in the state witnesses is not optimal, therefore this EIP will allow proofs to represent the nonce in a more optimized way.
 
 Additionally it could prove beneficial to transaction formats, where some improvements are potentially sought by at least three other proposals.
 
-Lastly this facilitates a minor optimisation in clients, because the nonce no longer needs to be kept as a 256-bit number.
+Lastly, this facilitates a minor optimisation in clients, because the nonce no longer needs to be kept as a 256-bit number.
 
 ## Specification
 
@@ -42,21 +41,13 @@ This mode of replay protection is out of fashion since [EIP-155](./eip-155.md) i
 
 While this is a breaking change, no actual effect should be visible:
 
-1. There is no account in the state currently which would have a nonce exceeding that value. **Need to double check, but would be very surprised.**
+1. There is no account in the state currently which would have a nonce exceeding that value. As of November 2020, the account `0xea674fdde714fd979de3edf0f56aa9716b898ec8` is responsible for the highest account nonce at approximately 29 million.
 
 2. go-ethereum already has this restriction in place (`state.Account.Nonce` and `types.txdata.AccountNonce` it as a 64-bit number).
 
 ## Security Considerations
 
-TBA
-
-## Test Cases
-
-TBA
-
-## Implementation
-
-TBA
+None.
 
 ## Copyright