I was well on my way to having a forest of RPis. The boxes are cheap, and "they only use 5W"... until you have 10 of them.

I replaced each and every one of them with an Intel NUC (6. gen Celeron) running FreeBSD, and created a jail for each of the services the individual RPIs maintained.

It uses 5-9W (Idle), which is like 80% of the time. It has real Gigabit Ethernet, as well as a SATA SSD, and that alone is enough to provide much higher performance (for me)

The only RPis i have left running are the individual nodes in my video/climate surveillance.