Parallelism and Generation Order in Masked Diffusion Language Models: Limits Today, Potential Tomorrow. - Yangyang Zhong; Yanmei Gu; Zhengqing Zang; Xiaomeng Li; Yuqi Ding; Xibei Jia; Yuting Shen; Zhenzhong Lan; Liwang Zhu; Weiping Liu; Junlin Zhou; Haisheng Liu; et al. (CoRR, 2026)