Is this culture of working weekends and having no vacation time really the norm though? I mean it seems to be in Silicon Valley and where startups are concerne

Is this culture of working weekends and having no vacation time really the norm though? I mean it seems to be in Silicon Valley and where startups are concerned, sure. But the average American likely doesn't work in that sort of company, with the kinds they work at (retailers, large corporations, etc) trending more towards a normal working week with more reasonable vacation options.