A good topic for discussion Uma. A relationship becomes "unhealthy" due to many reasons and the age difference is not necessarily a definitive cause. Incompatibility, ego, lack of trust, adultery, lack of respect, family, and even monetary issues play a major role in corrupting the relations between a man and his wife.
Age is but a number but the mindset that goes with it is what is important. Using the example of Santu and Dharamraj Mahiyavanshi to deem an age difference of decades as meaningless may not be entirely fair since relationships do get exaggerated in a fictional mileau.
It is the circumstances on which the marriage is based upon and the willingness to accept the differences that impact on the nature of the relationship that need highlighting. So, success and failure with a background of considerable age difference is completely dependent on the individuals concerned and their dreams and priorities at that time. The biological clock, the marriage bed and the advent of offspring from this union all become root causes of dissent among the couple.
Health or ill-health impacts the marriage differently based on the participating individuals and i dont feel right about giving my vote emphatically to one side or the other due to the large number of variables that are in play in such relationships.
All in all, the stand is "different strokes for different blokes"! But, for Sanraj, age has never been a barrier and looks like even a decade apart may not impact the chemistry. I dare not comment on the performance graph scientifically since the Gopikas are likely to maul me cheerfully!😆