Yeah, agreed. What you've described is exactly what it can be used for. However most people think 4x1GbE = 4 GbE when it's not quite that simple.I agree many people don't know the details but its still hugely beneficial in other situations where faster networking isn't available.
Before a recent upgrade I previously used a four port LAG on my file backup server and that machine was used by all my home PCs as disk imaging target as well it running my Proxmox backup server VM. I maxed out throughput on all links with concurrent backups during the backup window overnight.
Unrelated, does anyone here have a dynamic public IP and use UniFi Wireguard VPN server? The UI only allows you to enter a static IP, and there doesn't appear to be any way around this. I presume the answer is Teleport? Also anyone use dynamic and Cloudflare dynamic name updates at all? I see there's a few non-native ways to do it but I'm curious about the effectiveness.