Agree 100%.
The current route of emulation, such as the apps on the switch for NES/SNES, or even collections that publishers dish out like Konami has done with Castlevania, Contra or their classic arcade lines have added that little needed feature to make retro gaming a bit more appealing. Saving mid-run or just in general adds so much to the experience. Especially in this day and age when time is limited for some, and it allows you the option to pick-up, play for a few, save and carry on with your day.
Granted, save states are available for most emulators, but with something like the switch that has that portability aspect makes it a bit more appealing for most.