Before revision:  Follow-up CRDT variations are commonly labeled as "post-OT" techniques and have made broad claims of superiority over OT , in terms of correctness, time and space complexity, etc .
After revision:  Follow-up CRDT variations are commonly labeled as "post-OT" techniques capable of making concurrent operations natively commutative in co-editors. On top of that, CRDT solutions have made broad claims of superiority over OT , in terms of correctness, time and space complexity, etc .