I never had much time for Lady Colin Campbell but she has surely hit the nail on the head here..https://youtu.be/9I35n7o3THQ
I once thought similarly of her -a gossip monger par excellance- but recently, she's been worth listening to.
I see the Harry/Meghan situation as a repetition of Edward/Wallis (another Americam divorcee) in which a man is willing to give up life as he's previously known it to make his chosen woman happy. There was zero chance of Wallis leaving Edward, whilst I don't believe she'd ever wanted to marry him, she was too conscious that he'd given up a throne -albeit one he'd probably never wanted?- for her. Her standing in society meant everything to her. Meghan, in contrast, has already claimed to have "given up my life for this family" so may NOT be endowed with the same sense of duty to stay in the marriage. Also, unlike Wallis, who was happy to remain in the background, Meghan seems to prefer to be centre-stage.
I think it must be accepted that Harry was never going to marry -to quote one of his, many times, great grandmothers, "a bread and milk miss" who followed the rules his mother kicked against- but I no longer have the positive hopes I once had for their marriage. Meghan may have what SHE wants, but where does it leave Harry, who, at the momant, quite clearly adores her, and might be said to be within her thrall? One can't help but wonder, when doing nothing becomes tedious, if he'll yearn to be back with his military family, if not, his biological one?