Maybe, maybe not.
Thing is, to change the present model requires airlines to replace existing fleet prematurely. Presuming passenger loads are slow to return to pre-Covid19 levels then it may be hard to justify this cost. Cheaper to run what you’ve got until things pick up, by which time those older airframes will have paid for themselves.
The M.E. airlines have the advantage of cheap fuel, cheap labor, no pesky unions and are government owned. Quite a formidable combination to compete against.