> […] especially since the old OS is optimized for you and you can use it just fine. This is inaccurate. The fundamental issue is that Apple doesn’t backport s

> […] especially since the old OS is optimized for you and you can use it just fine. This is inaccurate. The fundamental issue is that Apple doesn’t backport security fixes to old iOS versions. This makes it untenable to use older iOS versions, unless you don’t care about the security of your data/device. If Apple changed their policy on backporting security fixes, they’d be able to offer iOS downgrades without compromising user security.