Corridor Dragon

It is well renown combat style! It helps player to destroy waves and waves of monster!
You have found big vault? Group of goblins? Don't panic! Just rush into nearest corridor and kill them one by one! They wouldn't be able to reach you with missiles and summons!

The question is -- why most of roguelikes have one tile corridors between areas (rooms etc)?
Answer is simple! Remember size of classic console window, it is tiny for modern times.
Also, one level of dungeon = one screen.
If we make good corridors and halls, they would eat up all free space!
One tile corridors is obsolete way to create game. It gives possibility of nearly uncontrollable scamming (DCSS has smite spell, but it is not a skeleton key for corridor dragon style).

It was in the past or games based on old games, like DC, but why new games has it?
Okay, I can understand one tile doors, but don't think it is good for gameplay, but corridors? Why?
Well. Doubtlessly, it is of this "please die" old features of ancient times. =)

PS
And I don't say that one tile corridors don't have right to exist! In some special occasions, like small shaft or secret passage, they would be exactly on their place. Anything we want to show as really small and narrow, but not every corridor in the game.