Very common. Mistakes happen, resolution can be slow. You might be able to justify a single payment gateway integration if you're MVP in a simple consumer reta

Very common. Mistakes happen, resolution can be slow. You might be able to justify a single payment gateway integration if you're MVP in a simple consumer retail business. If being unable to take orders for two weeks would be a big problem, then make sure you have at least two gateways, and keep them all warm.