Apple is making you buy a new iphone. They decided not to support the old API or to create adapters so that the ecosystem can live on decades.
Meanwhile, you can sill run apps from 20 years ago on Windows.
Meanwhile, you can sill run apps from 20 years ago on Windows.
Some Opensource projects like OpenSSL do have the same philosophy.
This is harder for the developpers to maintain old APIs but it does develop a sense of trust on the products.