They are still better than the incumbent banks on security though. An example is how they both issued new cards to their customers affected by recent Ticketmast

They are still better than the incumbent banks on security though. An example is how they both issued new cards to their customers affected by recent Ticketmaster data breaches, or British Airways hacks. After those events, they just contacted anyone who's shopped with the affected retailers and sent them new cards. I don't think this is an example of "not taking security seriously". No incumbent bank has done this, because it's expensive to issue new cards.