(Note this question presupposes that my credit score will always be high enough to qualify for a 0% interest card).
I've taken to using the introductory 0% interest rates on credit cards to my advantage - finding them to be a nice place to park large purchases, especially those made with shops and service-providers that don't normally offer financing themselves. The 0% period is usually 12 months, but some are 15 or 21 months.
For the past 3 years I've obtained a number of 0% interest cards from different banks, especially store-cards like Amazon, Macys, Lovesac, and Apple (an Apple-branded card from BarclayCardUS). Amazon and Lovesac are both rebranded Synchrony cards, and Macys is "DSNB" - their own in-house financing company. I also have 0% Citi card which has a generous 21 month period.
You might notice that these are all from different banks - supposing I get a Bank-of-America 0% card this year, and a WellsFargo card the following year - after a few more years I will have a card from every major bank in the US.
I'm assuming I can continue to do this provided a new 0% credit card offer comes along at least once a year, but eventually I'll need a second 0% card from a bank I already have one from.
...will banks eventually stop issuing 0% cards to me because I already have one, even if it's a different card range (e.g. Citi Simplicity vs Citi Diamond Preferred)?
(Note that I do pay at least the minimum payment every month and always pay-off the balance entirely at least a month before the 0% period ends).