Explore recent developments and open questions in cryptanalysis of ARX ciphers in this invited talk from FSE 2023. Delve into topics such as differential group analysis, automatic methods, correlation techniques, and linear cryptanalysis. Learn about finite automata, addition notations, carry vectors, and partitions. Examine the Molavesky technique, differential linear cryptanalysis formulas, and Sun Difference. Discover various automatic tools including Mixed Integer Linear Programming and Mixed Integer Quadratic Programming. Investigate experimental distinguishers and correlations, and engage with thought-provoking questions in this comprehensive overview of ARX cipher cryptanalysis.