Bare Metal Challenges
Modifying existing servers often proves less common than acquiring new systems due to the complexities involved. Adding components like RAM can be straightforward, but introducing new drives or network cards can disrupt the entire system's operation. The shift from legacy BIOS to UEFI can further complicate matters, as it alters drive enumeration and can lead to unexpected issues, making many organizations prefer to treat server upgrades as a complete overhaul rather than piecemeal modifications.In this clip
From this podcast

Software Engineering Radio - the podcast for professional software developers
Episode 506: Rob Hirschfeld on Bare Metal Infrastructure
Related Questions
How does the system operate in the episode Episode 506: Rob Hirschfeld on Bare Metal Infrastructure and the clip Out of Band Management?
What systems need to change?
What is an operating system in the context of the episode Episode 506: Rob Hirschfeld on Bare Metal Infrastructure and the clip Out of Band Management?