I would stick with Windows, provided she's not so fashion conscious that she's going to get jealous of all the other Mac users in uni and start bending your ear in 12 months time (happened to my little cousin, sigh).
There are rumours that Apple is planning to ditch the x86/64 CPU architecture and go back to RISC CPU's for their MAC's (
https://www.macrumors.com/guide/apple-silicon/) - presumably so their OS (and all the software on it) can be shared across all devices. I dont know how far this is gonna go, but knowing apple they may start deprecating support for current hardware in as little as 3-5 years.
As said above, the course/industry is important for software support.