The spin states of 2 deserve a comment as several different results have been obtained in the literature: a somewhat noisy electron paramagnetic resonance (EPR) spectrum was recorded of 2 in TaAA9, suggesting that a triplet is energetically within reach. Meanwhile Jones et al. obtained an EPR silent tyrosyl (2) for Hj AA9, while a very recent study proposes a triplet spin state for 2 in LsAA9 (also based on EPR). Comparisons to highly accurate multiconfigurational wavefunction (CASPT2) calculations on LPMO intermediates have shown that discrepancies for spin-state splittings can occur. Since the spin-state splittings generally are small for 2, we can only expect qualitative results (this is also the reason we mostly will base our conclusions on results obtained from two different DFT functionals).