The article you cite is principally about filamentary ReRAM. I...

The article you cite is principally about filamentary ReRAM. I note the quote:

"ReRAM won’t replace NAND or other memories, but it is expected to find its place, particularly in embedded memory applications. "ReRAM is a solution for cost-sensitive applications, such as wearables and IoT devices,” said Yau Kae Sheu, assistant vice president of embedded nonvolatile memory at UMC. “ReRAM is a fit for some low-end MCUs and consumer products with a lower memory density requirement.”

Wbt is targetting the embedded market, and have repeatedly said so.

Is not a competitor to 4ds Doesn't make sense to try to compare/cherry pick a characteristics (e.g. retention) that is important for embedded but not for storage class

(Note the article was written prior to 4ds commencing with imec.)