For me it depends on my mood, subject matter and the Kit.
If it is a Tank in a Dio, I couldn't be bothered much.
OTOH, if it is something like B-17, Tank or similar that has a very nice Interior it is nice to make a cut-away Model. Would I go out and blow $$$ on AM parts just to get the same level of detail I doubt it, but stranger things have happened.
Busy saving up for a Moto-Guzzi Model Kit that will be build as a cut-away model, full detail, the works.
I like strange and unusual kits, got a working CB750 engine model sitting on my office Desk.
Like I said for me it depends on the Kit, intended purpose of the Kit and the mood I am in.