I like Plexamp but there’s a couple of things to be aware of depending on your music library that took me a while to figure out:

• They downsample anything above 48kHz which isn’t a big deal but sucks if you have hi-res music. It won’t even tell you it’s transcoding if you check the dashboard and Plexamp will show it as playing at the actual sample rate which is misleading when trying to debug.
• It doesn’t distinguish between explicit and clean versions so if you have both then it will just look like duplicates. You also can’t favorite just the clean or explicit version as favoriting one will do the same for both versions.
• They don’t support Spatial Audio/Dolby Atmos(E-AC-3) music. Doesn’t matter if they are m4a or flac. Again, nothing about transcoding in the dashboard but the sound will be horrible. It does at least show in Plexamp that the song is playing as Opus. I know everyone says multichannel music isn’t worth it, but I wanted to try it out and was very disappointed when Plexamp wouldn’t play them.

These probably aren’t issues to the majority of users with just their favorite songs in mp3 or flac 16-44, but it’s something for people with larger hi-res/multichannel libraries to be aware of that I recently learned.