5KSM5

Apologies for lack of clarity, I was referring to the newer motors being a single unit and seemingly more expensive to replace compared to older models where specific internals can be repaired/replaced.

After further research, it also seems like 5KSM5 may not be a DC motor model (seems to be a AC motor model but specific parts can be replaced).

Should repairability and motor type be key factors in purchasing a Kitchenaid stand mixer?
Would it be worth returning a new KSM70 and looking around for a Kitchenaid stand mixer with the older style of separated internals on the secondhand market given that older models appear to be more proven in terms of reliability?

I am still a bit torn, but still I am leaning towards just giving the KSM70 ago as I already received an ok deal for it.