[rzzzt]

Yes, around 2009: https://www.techpowerup.com/96967/dualbios-becomes-standard-...

[jonathanlydall]

Gigabyte has had dual bios motherboards since 1999, but made it standard for all their motherboards in 2009.

https://www.gigabyte.com/Press/News/795

As I recall, they initially introduced this feature due to a virus around the time which would intentionally corrupt BIOSes.

[patrakov]

The CIH virus? https://en.wikipedia.org/wiki/CIH_(computer_virus)