I don't know if this would be of interest to you, but https://lancache.net/ is really fun to setup. I assigned an old (unreliable) 500gb SSD to a Linux VM and run Lancache on it. A couple tweaks to Pi Hole and every system in your house will use with no configuration (and fallback to Steam if it's down).

If you only have a single gaming system it won't matter but if you have a few it's fun to watch the second one get 100MB/s Steam downloads in a house with 20MB/s internet.

Steam downloads are plain HTTP in separate file chunks. Easy to cache and load balance across connections.