Leil Seder
Halacha requires we at least try to stay awake all night
Most don’t even bother trying
Leil Shavuos
Halacha doesn’t mention staying up
But we do anyway
1-Why does Pesach require it?
2-And why do we ignore it?
3-Why does Shavuos not require it?
4-And why do we stretch ourselves to do it?