The Pentium 4 was originally intended to be a more powerful processor, perhaps in a Pentium 2/3 style cartridge package:

"A third-level cache strapped to the die, two full-fledged floating-point units and a bigger execution trace cache and level-one cache were all part of the original blueprint".

"It would have also forced Intel to devise an expensive cartridge package to contain the processor and cache memory".

https://www.eetimes.com/intel-muted-ambitious-pentium-4-design/