For many years I had only 1 credit card from my friendly credit union. When I made a trip to Alaska with a caravan, I started worrying about only having 1 with me. Several people had their credit card shut off for one reason or another and they had to try to get through to the credit card company to get them turned on again. I didn't have any problem but I worried about it or having my card damaged or something. When I returned, I got a card just for gas purchases at Costco where I get all my gas. It is an American Express unfortunately but I can use it in an emergency.
When I was in the hospital for three weeks unexpectedly, I was not sure if I had made a payment before the due date because I normally pay it off every 2 weeks when I get paid and pay no attention to the due date. I called the credit union and asked them to check it which they did and I had paid on it. They set up a process where if I don't make a payment, they will deduct the minimum amount from my checking account which is backed up by a savings account. Since I live alone and if I ended up sick and in the hospital again or if for some reason when traveling, I can't get internet access, I don't need to worry about a late payment. The credit union has great personal service and I have been with them for 30 years so I trust them to take care of things for me. Just some thoughts.