QST: How "safe" is it to pickle a DataFrame with v1.x for long(er) term storage? 

#### Question about pandas

How "safe" is pickling `DataFrame` objects with v1.x for long term?  Pickling in past versions has been a sort of gamble, as expected, but I'm wondering how the long term storability is for `pandas` objects (in particular, `DataFrame`) now that the API has solidified in v1.x. 
