I guess at least second half of 2025 for 6×6, or maybe 7×7,and I'll not surprise if all 4 WR still belongs to Max at that time.
Both 4×4 and 5×5 avg are almost 1.5s faster than WR2, so I guess "maybe" second half of 2024 if we're lucky; single: both could be break in 2024.
(4×4 single by Sebastian, 5×5 I don't know)