4k120 panels weren’t even available in 2017 afaik. But you could do dual 4k120 with one hdmi 2.1 and 1 displayport 1.4 so just need 2 video outputs from your laptop (which used to be pretty common).

Please note that we’re having this discussion in 2024 and I’m talkimg about use cases in 2024. I don’t really see the point in talking about what you would theoretically do 6 years ago with panels that weren’t even available.