15 vacation days is supposed to be good? I have 30 vacation days + 20 extra days for sabbatical every 4 years. How do you even do longer 3-4 week trips with a l

15 vacation days is supposed to be good? I have 30 vacation days + 20 extra days for sabbatical every 4 years. How do you even do longer 3-4 week trips with a limited mount of vacation like that?