No, really, the headphone jack is more useful than you think
techcrunch.com
techcrunch.com
That said, none of the points this article raises would matter if Apple would just stop insisting on being needlessly different and adopt USB-C like they should. Lightning was arguably slightly better than MicroUSB but USB-C does everything it does and more while also being standard instead of a pointless special snowflake.
I say keep the jack on devices where the space is available and use USB-C with alternate modes for everything else.
Anyone with any sense will see this as a good opportunity to give Android a spin.