I... kinda fail to see how? You'd think they'd appeal to the current generation with a big recent title like P5 or something more mainstream.
I may be speaking out of line, but... Atelier is definitely not what I think about when someone says "appeals to new players", with how relatively niche it seems to be. Especially because a quick search told me the series originates from the 90s.
The series is definitely niche, especially outside of Japan. And even in Japan it wasn't exactly thriving either, but the Ryza game was highly successful in Japan for a "niche" series. It definitely brought in a lot of newer players into the series.
Just for comparison to other popular characters games/ previous Atelier games(JP sales only, only physical):
- The Atelier game before Ryza (not remakes) sold 30 000 copies in it's first week.
- DMC 5 sold 120k in japan in it's first week (PS4/Xbox/PC)
- Crash N'Sane Trilogy sold 30 000 in it's first week (PS4 only). When the Switch version launched it did another 6 000 sales.
- Astral Chain did around 32 000.
- Nier Automata did around 200 000.
- Xenoblade Chronicles 2 sold a little over 100k on the Switch on release.
- Fire Emblem 3 Houses sold 150k at launch.
- Atelier Ryza sold around 150k (PS4/Switch). Even though the series itself is old, a lot of people who played Ryza were definitely newer to the series. Now obviously on a worldwide scale she is much more niche than any of the other series, but it was a highly successful game in Japan; especially for a series that typically got 10-20k sales and maybe 30k-40k lifetime per entry.
Decently mainstream JRPG series over there like Persona or Tales usually end up selling around 250-350k on launch nowadays. Meanwhile the juggernauts like KH, Monster Hunter, FF, and DQ usually end up selling around 1mil or higher.
I don't even know why I'm trying to defend my point, because I really do believe that the leak is fake and just lucked out.