I realized I asked a similar question but then let's put it another way: would it be problematic if in reverse, some quantic phenomenons were found to be described well by Newtonian equations ?
This wouldn't be "problematic", it's just extremely unlikely to happen. The math of QM is fully understood. No experiment in over 50 years has produced results incompatible with QM. (This has produced a major crisis in physics.) Some aspects of the math of QM -- the ones that produce the "quantum weirdness" that gets everyone's attention -- are fundamentally incompatible with the math of classical mechanics. CM is local, QM is non-local. Locality is intuitive, non-locality is not. So the odds of discovering something fundamentally new in QM at all, let alone something that can be described by the math of CM, are indistinguishable from zero.
There are some aspects of our day-to-day lives that are governed by QM, like rainbows and transistors. But not weather or climate. Those are purely classical phenomena.
There are some aspects of our day-to-day lives that are governed by QM, like rainbows and transistors. But not weather or climate. Those are purely classical phenomena.