I think it’s a hypothetical dilemma that’s not worth a lot of thought until acceptances come in. The vast majority of applicants won’t be accepted to any one of these schools, much less all four, notwithstanding a few silly (in my view) news stories each year about a student admitted to all eight Ivies plus Stanford and MIT.
For example, only around 10% of Stanford admits are also admitted to Harvard, and that’s of the 5% who get into Stanford so that’s 0.5% of Stanford applicants. I don’t know what the percentage would be adding Yale and MIT but certainly very low.
Partly this is due to self-selection - some who are admitted in the early round to one don’t even apply anywhere else - and partly because each school has its own holistic admissions process.