I think it is mostly about running servers (standard services that don't change much) for 10 years (and more). You don't need 10 year LTS distribution for build

I think it is mostly about running servers (standard services that don't change much) for 10 years (and more). You don't need 10 year LTS distribution for building a product. You take whatever version of OS distribution you like, secure local copy should the upstream disappear, and vendor it into your product and never deviate from it.