> Give time to researchers to gather enough mappings between source code and machine code, get used to training large predictive models, and you shall see top notch decompilers that beat all engineered methods.

Not anytime soon. There is more to a decompiler than assembly being converted to x language. File parsers, disassemblers, type reconstruction, etc are all functionality that have to run before a “machine code” can be converted to the most basics of decompiler output.