From my (limited) understanding, the M1s are a logistical / maintenance hard road for the Ukrainians.
I wouldn’t be surprised if no maintenance takes place in Ukraine. Any ‘repairs’ and the M1 gets shipped out of the country.
Read the M1 uses jet fuel and not diesel like the Leopards.
It seems to me, the M1 deployment is mostly to entice the Germans and EU to send the Leopards.
Because of the weight of the M1s, they maybe confined to certain areas of the Ukrainian front lines.
Wrong - jet fuel is the best fuel but it can use any fuel. Parts delivered from US German and other stock piles in 3-4 hours.
UA is installing portable 100 ton bridges every where.