From my understanding only...
As long as one is physically alive some form of suffering is
inevitable.
Why is that so? Because the body and all of its functional
relations are still there.
If 'all is an illusion', the moment that this is realised... the
body should go 'poof' and disappear into thin air. But, alas, that
is not the case.
This is perhaps because all causes, effects and conditions
pertaining to body are still intact, even after realisations... and
thereforth pose the remaining sets of suffering pertaining to
bodily functioning, sustaining and maintaining.
However, perhaps with the disintegration of the body upon death...
these remaining conditions will also be gone for good... for one
who completes the path.
Again pls read with discernment.