Appeals and liberalizing laws

Is a contention on appeal, which has subsequently been granted service-connection under a liberalizing law, moot?

Using the TDIU form as a supplemental appeal

Can an application for TDIU, using TDIU form (21-8940), serve as a supplemental appeal without a 21-0995 form being filed?

Considering medications in musculoskeletal ratings

Should the use of medications used to alleviate pain and other symptoms of musculoskeletal conditions be considered when evaluating severity?