Huge enterprises are often made up of thousands of sub-domains with relative freedom to choose different technology.
It's actually useful to remember if you're a start-up chasing a contract with an enterprise. You might bend over backward accommodating BigCo to get their name on your books thinking you'll make it huge once "they" start using your technology only to find it never actually gets further than 2 people in Sub-Department-Offshoot, and while you might get to use that fancy logo on your marketing material, you'll wonder if the concessions and vastly undercharged overwork was really worth it because the payday of actually having BigCo use your tech throughout their stack never materialised (because it never really does, but it'll be endlessly dangled in front of you to get you to agree to put in a bunch of features for free).
It's actually useful to remember if you're a start-up chasing a contract with an enterprise. You might bend over backward accommodating BigCo to get their name on your books thinking you'll make it huge once "they" start using your technology only to find it never actually gets further than 2 people in Sub-Department-Offshoot, and while you might get to use that fancy logo on your marketing material, you'll wonder if the concessions and vastly undercharged overwork was really worth it because the payday of actually having BigCo use your tech throughout their stack never materialised (because it never really does, but it'll be endlessly dangled in front of you to get you to agree to put in a bunch of features for free).