Since launching in September 2018, Nintendo Switch Online has added several new NES games each month. As of this month, that's ending.
"More NES games will be added in the future, but those releases will not adhere to a regular schedule," a Nintendo representative told Business Insider in an email this week.
Unfortunately, the same thing applies to Super Nintendo games. "More Super NES games will be added after launch, but those releases will not adhere to a regular schedule," the representative said.