We know that spouses use the i 864 to obtain support in Divorce Cases. Links were provided to a Law practice that does just this and court case.
People are warned all the time of the extent of their obligations under the I 864, now most seem to ignore it, it will never happen to me etc.
I think the misleading 10 years came out of the 40 Quarters = 10 years, the 10 year GC is irrelevant.
Many sponsored persons will never achieve 40 Quarters, people who sponsor aged parents for example, and I have seen cases where disabled children/adults who will clearly never work are sponsored..
On the other hand there are spouses who never work but because the marriage has lasted long enough to acquire 40 quarters based on their US Spouses contributions.