agricola
a genuine importer of owls
Not at all. I know Russian competence has been in short supply, but if they're going to do things even slightly right then T-55s will not get within 20 miles of a modern MBT. It would be a complete death sentence. The DU rounds are for the T-90s.
The opposite. If Russia has more tanks, Ukraine has to kill more tanks in the same period of time - that means shooting at the absolute cusp of effective range - and DU rounds will kill modern tanks at 5km. This then allows the Ukrainians to concentrate on the antiques roadshow trundling towards them that can only effectively fire at 2-3km. HESH will kill a T-55 at 5km, but not an upgraded T-72 - only APFSDS will do that.
there are multiple types of APFSDS rounds that we could have sent which do not use DU, though