I upgraded from the 2021 12.9 to the M4 13" but a big driver was getting an upgrade for my wife's Air 2 - she happily took the 12.9 + MKB. But I'll usually pass on older iPads to family members if I see something in the new models that really interests me. Having the M4 13", the next update will be a long way off; I can't think of anything that would really compel me on the h/w side.