I posted this last night, and completely forgot to get the web demo from the repo onto GitHub Pages. Here you go: https://flo-audio.github.io/demo/

Opus is, obviously, currently more optimized, offers better lossy compression, and has really low latency (great for streaming)

It does have some problems though :P Metadata editing is one of the hardest out of most formats, You would need two separate formats (FLAC + ogg) to keep lossless + lossy

flo can be lossless as well as lossy, metadata editing is extremely easy, much richer metadata, simpler but subjectively better file organization/format, and I tried to optimize it for the web!