If your wife/husband ended up in coma for life, would you care for them, or would you leave them?

I remembered a story we once did in highschool. A man fell into a coma, and he’s been comatose for several decades. His wife was by his side all the time. They told her he will never wake up, but she still stayed with him.
If your spouse (hopefully not) ended up in a coma, and doctors tell you s/he will never wake up, would you care for them for decades, or would you leave them?