IMHO it does fit, and AFAIK the things you show in fact perfectly demonstrate what the GPU can do for optical smoothness. (Some years ago, for some special graphics editor, I coded such GPU based item zoom and pan features.)
OTOH, I don't see a "problem" with this (IMHO rather slight) disadvantage of the Reaper GUI, IMHO Audio performance and flexibility are a much more essencial criterion for a DAW.
-Michael
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