storing a session on SD Card consumes some time where the sequencer can’t generate new events. Very often you might not recognize this if the system isn’t heavily loaded so that store operations can be done quickly. But this changes than more MIDI events are played per step.
Therefore I think that an autosave will disturb more than it would help - it’s better to store only on demand.
QY700 has likely a different way to store edit data. I guess it’s stored on a non-volatile memory which doesn’t exist for MBSEQV4
Of course accessing an sd card is just time killer but it’s an option you’ll be warned,furthermore it has never cut with actual speed sd card from my side!
At edit time it would not be annoying, and more useful, storing the session, is something we have to do so many times!
Of course for performances, you remove it, like there is a live button, which is still confusing for me as i don’t really know what it does, but it could disable the option when enabled, of course with an option to select this behavior!
Regarding the performances, i’m around 20% of use, saving a session add 17% on 20%, meaning less than 6% at 80% of course on the stfm4.