Why not update old dummsy?

Since we had still 50lvl and 60lvl. As We have max level 70 and new dummy too 70lvl.

Old dummyes came useless on house as we needed new dummy.
If we want still use old dummys as we don't like new dummys.

Would nice old dummys get update 50, 60 and 70 at 80lvl when shadowbringers come out.