I'm curious, in practical term (not throttle emulator via browser's developer tool), does single page app 'works' in location of low speed internet? By 'works'

I'm curious, in practical term (not throttle emulator via browser's developer tool), does single page app 'works' in location of low speed internet? By 'works', I mean not just content been served, but overall usages not making you wanting to abandon this site.