This was still true 5 years ago but lots of big budget films are mastered in 4k now that storage and raw compute power have caught up. Disney notably dragged t

This was still true 5 years ago but lots of big budget films are mastered in 4k now that storage and raw compute power have caught up. Disney notably dragged their feet, but starting this year all their new MCU movies are finally being mastered with a 4k intermediate.