All excellent points. A lighter more mobile tank is certainly needed. But, I would not suggest scrapping the Abrams just yet. Keep in mind that in the years leading up to Desert Storm all the smart military thinkers had declared the time of big tank battles had passed. And btw, the same for division size infantry.
Abrams still has a place and I wouldn’t want to see it scrapped until a real replacement comes around but no telling when that will be.
I guessing not too far down the road we’ll have drone tanks being fought by drone aircraft.