In my opinion, the disadvantages outweigh the advantages. If you are lucky, your mother-in-law will bring you a free nanny. She will wait on you and your husband without complaint, washing clothes, cooking and cleaning. After you give birth, she will do her best to help you take care of the child and relieve your worries. But such a mother-in-law is rare, almost none.
If you are unlucky, the mother-in-law you meet may pretend to be a hero. Because your husband grew up, they want you to respect her and ask you questions everywhere. What's more, the mean mother-in-law will make trouble and sow discord until you have no position in the family.
Remember, the relationship between mother-in-law and daughter-in-law has been a natural enemy since ancient times. A successful mother-in-law relationship is a peaceful place. Don't think that the relationship between mother-in-law and daughter-in-law is comparable to that between mother and daughter. This is a dream.
If possible, it's best not to live with the elderly, so as to create the aesthetic feeling of distance and reduce many disputes and right and wrong.
If you can only live under one roof, then a daughter-in-law should not expect too much from her mother-in-law, don't expect her mother-in-law to tolerate herself like her mother-in-law, and don't think her mother-in-law cares and loves herself like her mother-in-law. Move more when you get along, and talk less when you don't.