At home/lan we use LACP, VRRP... I mean link aggregation and HA needs are solved time ago.

With multiple ISPs, or on a complex enough LAN, we can use multiple routing tables + weights too.

Also, if the ISP at home can do 10Gbps, 1Gbps, 300 Mbps whatever... I want to be able to use them with a single path, so there is no gain using multiple paths. Eventually, when I have cable+wifi connected at the same time, I use to force one of both, cannot see a reason to prefer using both at the same time.

Maybe the latency thing? Never had that issue at home, but could understand that usage case "just use the network segment with less latency to reach $thing".