Sure he's still one of the top players, but he's not as strong this year and OP is suggesting he still has an edge against the GOAT, who this year:
- Has won Freestyle WC
- Has won SCC
- Has won 2x Titled Tuesday's
- Has won a Freestyle Friday
Hikaru can snipe a win off Magnus here and there, but I don't think there's any time control or format where he could win a long series of chess matches against Magnus.