If you've never used an iPhone near it's storage limit, I wouldn't wish it on you.

Performance nosedives, then it starts bootlooping randomly, and eventually you can't even delete stuff because there's no space to delete things.

You resort to randomly trying to remove apps, but sometimes that fails because of the stability issues.

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The only reason I replaced my 12 Pro was storage, and I made up my mind never to skimp on storage again.

That phone lasted me 5 years and could easily have gone several more, so I see it as an extremely cheap investment across the lifetime of the phone.