I don’t see Norwegian in their current shape and form surviving however:
Norway might be interested in a controlling stake in a “national” airline serving OSL. If Norwegian can renegotiate its leases and Norway can buy the airline on the cheap it might be viable in the long term in a much smaller form. Look at the Aerlingus model connecting Europe and North America or Finnair between Asia and Europe. Competing on a short haul market with WIZZ or RYR would be a complete death sentence as is LH loco.