When I started one of my instructors had equipment that by standards in 2000 would have been considered antique at 25 years old, and it still worked real good for him

If you learn on a regular trainer, then you could go back to sailplanes or go to sport power whatever you like.

Sig has made good trainers. I did not learn on a Sig buy my son is learning on one LT40 with a supertigre GS40

Richard