Over the past 2 weeks, there haven't been any cashiers on duty, making customers check themselves out. What is going on?

Other than short staff? Well... Efficiency and snowstorm caused that, let's be honest no one likes long lines and no one is fast on scanning people like things used to be

Times, they are a changin'. Things aren't ever going to be like they used to be...

I actually prefer self-check out because I'm quicker than the cashiers

There is a new norm now. Less labor has been the trend even before Covid.

Staffing