[notatoad]

there's enough cheap parts floating around now that offer standalone conversion from USB-PD to raw DC voltage. if customers are preferring USB connections, OEMs will find a way to implement it.

something like this is no more difficult to implement than a barrel plug https://www.aliexpress.com/item/1005005315614647.html

[sowbug]

I took a few of those USB-PD decoy boards and soldered them to some universal power jacks. Now I have a home kit that can power any legacy barrel-jack devices. I did have to label each cable with the hard-wired voltage so I don't mix them up.

Basically a DIY version of this: https://www.aliexpress.us/item/3256804001423573.html