And before Boogie Nights there's a history of it in Cinema:
http://www.tasteofcinema.com/2016/the-10-longest-unbroken-sh... the ones earlier than Boogie Nights:
Nostalghia (Andrei Tarkovsky, 1983, 9m20s) Rope (Alfred Hitchcock, 1948, 1h20m)
and this came out about the same time, so I'm pretty sure they had overlapping production:
Snake Eyes (Brian De Palma, 1998, 12m57s)
As Hitchcock explained in the Hitchbook, that is not an unbroken shot, merely an illusion of one. Film reels at the time just weren't long enough.
And before Boogie Nights there's a history of it in Cinema:
http://www.tasteofcinema.com/2016/the-10-longest-unbroken-sh... the ones earlier than Boogie Nights:
Nostalghia (Andrei Tarkovsky, 1983, 9m20s) Rope (Alfred Hitchcock, 1948, 1h20m)
and this came out about the same time, so I'm pretty sure they had overlapping production:
Snake Eyes (Brian De Palma, 1998, 12m57s)