Posting for later read.
Also noteworthy quote:
>the conclusion that the odds are stacked against Ukraine to be able to field an effective force, possibly any time before this fall.
So maybe the tank battalions were assembled during March, or even a brigade with both modern western armor, and some Soviet models, half/half, but they can just fart around, not participate in ambitious offensives. They could gather XP in smaller clashes, until Abrams arrive as well.
https://www.19fortyfive.com/2023/01/ukraines-new-m1-abrams-and-leopard-2-tanks-are-no-silver-bullet/