Bombardier also talking to Fokker about taking over the F70/F100.
At any given time, Bombardier are probably talking to most other manufacturers. In this instance, their main interest will be in ensuring that the F70/F100 remains dead.
A light airframe that needed better engines. I guess the Fokker people at that time where still too proud / stubborn / legally restricted.
At the time the F100 was being developed, the Tay was the best fit for the aircraft size and mission.