There was recent news(April/March) about Norwegian actually running extremely low on cash to a point of bankruptcy and the airline laid off like 90% of their workforce due to Covid19 pandemic and lack of flights/demand.
Even on domestic flights in Europe they are a pretty reasonable experience, much better than Ryanair and Easyjet at least. They are often priced about 10-20% more expensive than Ryanair and Easyjet when you probably get double the comfort and service and half the annoyances. I might sound like a shill for Norwegian but I think they really fill the Southwest niche here - a decently low cost (but not lowest) airline that doesn’t treat you or it’s employees like shit.
That’s not to say they are without flaws either. I and others have had some sketchy times where Norwegian has fought awarding the EU mandated reimbursement for delayed/cancelled flights. But no other international airline in Europe straddles the line between legacy carrier level of service and barebones low-cost as well as Norwegian.
"However, with the scheduled flights gradually resuming, the airline is restructuring its fleet and focusing on short- and medium-range destinations. Europe’s fourth-largest low-cost carrier will likely completely discontinue the long-haul flights that sank the company into debt."