Or rather: Switzerland cut their primary A2G capabilities about 30 years ago. When they bought the F-5.
The competition is interesting in the following regard:
- Gripen: cheapest
- Rafale: only one with combat record (i count dropping bombs in Afghanistan)
- Eurofighter: best A2A capability
- Super Hornet: limited commonality with existing fleet
A few notes maybe:
The Swiss Military has increased participation in joint maneuvers and training with NATO in the past few years, in particular Germany. Not just limited to some air combat routine (which has been going on for decades), but to the point that Switzerland took part in NATO SAM training on Crete last year. Germany and Switzerland also cooperate extensively in both air and battlefield surveillance systems, i.e. C4I, ground-based air surveillance and UAVs.
Unless SAAB can showcase functional Link-16 (which it doesn't have so far, though its on the list of things to be integrated), zero chance for the Gripen.
As for immediate delivery, Eurofighter is just as available through a similar "castling" as was done for Austria.