Journeys (the shoe chain) and Hollister Co. both use Linux distros on their point of sale machines. Hollister’s machines are pretty locked down and can basically only run the RPoS software, but a lot of Journeys’ software is browser-based, so they have to be a bit more capable.
Pretty sure they’re both custom distros, though.
The plot badly needs some pruning shears taken to it; to say that it moves at a snails pace is an insult to snails. Like, why did we need an entire faux high school arc? There’s plot-relevant stuff there, but they can cut most of that and the game would be better. Filler arcs in a story that’s…what, ten games now? That’s why this series is still obscure, despite there being a lot to like here.
If you need something to scratch that JRPG itch, you can do a lot worse, and there’s a reason this series shows up on “hidden gems” list. But…damn. There’s so much content and story, and a fair chunk is little better than filler.