  Once quantum corrections are taken into account, the strong coupling limit of
the $\xi$-attractor models (in metric gravity) might depart from the usual
Starobinsky solution and move into linear inflation. Furthermore, it is well
known that the metric and Palatini formulations of gravity lead to different
inflationary predictions in presence of non-minimally couplings between gravity
and the inflaton. In this letter we show that for a certain class of
non-minimally coupled models, loop corrections will lead to a linear inflation
attractor regardless of the adopted gravity formulation.
