Researchers typically use what's easily available, cheap and well understood. Back in the day it was serial connectors. It's just a bog-standard connector. A m

Researchers typically use what's easily available, cheap and well understood. Back in the day it was serial connectors. It's just a bog-standard connector. A mature product may well use a proprietary connector that isolates against brain-zapping, has better shielding, has no snap-off parts, etc.