In a large bowl, using an electric mixer fitted with the paddle attachment, beat 1 package of the cream cheese, ⅓ cup of the sugar, and the cornstarch together on low until creamy, about 3 minutes, scraping down the bowl several times.
Blend in the remaining cream cheese, one package at a time, beating well and scraping down the bowl after each.
Increase the mixer speed to medium and beat in the remaining sugar, then the vanilla.
Blend in the eggs, one at a time, beating well after each.
Beat in the cream just until completely blended.
The filling will look light and creamy.
Don't overmix!
Gently pour the batter over the crust.
Use a cheesecake moat OR Wrap the sides of the pan in aluminum foil.
Place the cake pan in a large shallow pan containing hot water that comes halfway (about 1 inch) up the side of the springform.
Bake until the edge is light golden brown, the top is light gold, and the center barely jiggles, about 1¼ hours.
Remove the cheesecake from the water bath, transfer to a wire rack, and let cool for 2 hours.
Chill until cold.