The difference there is that SAAB still supports the SAAB 340 type certificate and is willing to help sign off on engineering changes/issues, and has still a lot of in house expertise to manage engineering changes and certification. That means that the 340 is only an, 'out of production' type, not obsolete. This goes on to issues such as airframe life, where they keep signing off on extensions based on in service data and testing outcomes. This is different to say the F27/F50, which lost its parent company, encountered a few airframe ending limits, and now the fleet is condemned without operators spending big bucks. Brasillias, Jetstreams and Metros are in the same boat, where the onus is on the operators mostly to fund any life extending patches.