I disagree. Engineers will typically stick to the mathematical meaning of unlimited but I think there is *always* an unspoken social contract behind the word: be nice.

For example, if I sign up for "unlimited cloud storage", I take it to mean, backing up all my personal stuff, no matter how large it grows. If I have the world's largest collection of digitized rocks in 8K Raw and it takes up 2 million terabytes...well I think I'm being disingenous by using the unlimited storage.

Or for example, if a friend says "use my car any time you want"...will you really just steal his car and ship it to another country?

I mean...nothing in this world is unlimited for real. And I think it makes sense to say unlimited to mean: you can use as much as you like, but be nice.