Speaking of vintage audio interface with a modern touch, I love my stereo amp: a Yamaha amp with the old look of the Yamaha amp from the 80s, but with also a tiny OLED display on the bottom, "hidden" in a black band and that only shows fonts in blue (imitating an old monochrome seven-segment display or something).

Yamaha R-N1000A:

https://media.ldlc.com/r1600/ld/products/00/06/27/71/LD00062...

It is a thing of beauty. One could lament that the knobs are good looking but just cheap plastic knobs and not, unlike back in the days (at least on some models), actual metallic knobs.

It's a fully integrated amp with ethernet, a modern DAC, many input sources, room correction, etc. but it looks like a hi-fi component pulled straight of an 80s stereo stack.

P.S: there's also the same amp but with vu-meters and a bit more powerful etc. but then it gets really pricey