The other thing about tape speed...specifically 15 ips and 30 ips...very often speed selection is not done for the similar kind of reasons as you might choose 48 kHz over 96 kHz.
IOW...there's often a production decision to use one tape speed over the other, as the impact on the final sound of each speed choice can be used creatively, and not purely analytically, as you would with digital sampling choices.
That said...I've heard of some cases where people favor older, 16 bit processors to more modern 24 bit ones with higher sampling rates, because the grainy quality they add may be desirable, in some cases, to some people.
It's not unusual that even to this day, people try to find ways to compare analog tape to digital recording. Not to mention, that digital as advanced as it has become, can't shed it's desire to BE compared to analog.
I'm looking at the back cover of my current Tape Op, and there's a full page ad for UA Apollo interfaces...and the caption reads:
Superior conversion meets the tone, feel and realtime workflow of classic analog recording.