What does "Flight modes to avoid" mean?

[py_py]

https://ardupilot.org/plane/docs/quadplane-flight-modes.html
In the link it says, do not use stabilize mode. But why? and is it still valid?

[geofrancis ([𝙂𝙚𝙤])]

It says it in the discription

“the quadplane logic does not engage the quad motors when in these modes”