My Mum was still doing online ordering groceries when she was 93, although there were times when she wasn't well she needed help. I'm not yet pension age and up until just before I got married it was possible for married women to pay a 'married women's stamp, it's not long since a woman's income went on her husband's tax return, but you weren't allowed to see it unless he let you, and I know women under the age of 94 who were not allowed to learn to drive, had to rely on lifts from their husband, most bills were in the man's name, I have even missed off a joint account by the building society, suddenly realised I wasn't on the statements, I had to prove that it was a joint account.
I have also known women who learned to drive after losing their husband and have coped with taking on all the life admin. My now ex-husband had to learn how to take a car for it's MOT, insure it, set up a computer, and most of the rest of the stuff that I had always had to do, I presume he did learn. I myself, it just got easier after he left as didn't have to try to involve him in decisions on things like utilities, new stuff for the house, insurance, that he was not interested in, but would complain if you didn't consult him. Apart from online banking, I had to have a bit of persuasion to do that and still will not do it on my phone, and only fully sorted it out when covid hit.