I have a switch that eMMC is broken, fully failed. I have no backup of that one.
I have another two switches that work and work with Atmosphere/Hekate.
I know that there is a way to rebuild eMMC for a broken eMMC from another switch but... I do not want to buy new eMMC (if not necessary)...
Cruisn on the Wii is one of my personal examples of that, it's considered one of the worst games of all time, I loved it and completed it several times.