This misunderstands the role that GRUB2 plays in the modern boot flow. It also equates systemd with "our one true savior" and inserts it (as usual) in place of simply addressing whatever is "missing in GRUB". Not reducing complexity but simply shoving more shit into systemd that doesn't belong there. Finally, it ignores the ability to work with Microsoft to deliver an improved user experience. Those are the same people who also use multi-level boot processes rather than direct kernel boot, for the same reasons GRUB2 works wonderfully on modern Linux systems.

I will not support this encroachment and will fight it. Before you come disrupting what works, you had better have a good reason. Last time I checked, GRUB could also be configured to skip the menu and you can easily implement failover last known good. Come sit next to me in my rocking chair, the lawn is freshly mown and ready.