https://www.cnet.com/news/snes-games-could-be-coming-to-nintendo-switch-online/

Many of these games are among the finest on the console, which came out in the US in 1991, and the lineup is little different from that of the SNES Classic mini console Nintendo released in 2017. 

The inclusion of Star Fox 2, made playable on the SNES Classic 22 years after being canceled, is surprising since it's exclusive to that system. But Nintendo of America President Reggie Fils-Aime said in December that the systems might not be available much longer.