Thinkstation D20 in 2020: Still worth it?

Hey guys, new forum member and recent lurker. I could use your thoughts. I think this would fit under this location on the thread. Please correct if wrong. Here’s my question. Does a Thinkstation with dual Xeon L5640 CPUs with 12GB of RAM still hold up well in 2020 as a NAS and Plex Media Server? I’m seeing a passmark score between 8000-9000. I think I may be able to build one with two WD 4TB HDDs (I already had 1) for < $300 total.

I would only be using this as a file server (pics, docs, etc.) and as a Plex Media Server as well streaming/transcoding 1-2 streams max.

I’d love to get the group’s thoughts. Thanks!