Since 1a04b50674 triggered comments like 'stupid, lazy, technical criticism, dick, you vs. us' most probably it's the best to focus on Armbian's current mantra 'quantity first, quality second' (trying to provide OS images for as much SBC as possible so it's ensured none of these things can be supported properly).
Within the last 2 years nobody gave a shit about low-level optimizations except @paolosabatino when adding support for RK322X. Macchiatobin, La Frite, RockPi S, Odroid C4 and N2 are all plagued by an artificial bottleneck on `cpu0`. Other boards that were added since 2018 inherited already present optimizations more or less by accident. So let's try to be consistent and destroy N2 performance to be in sync with almost all other Armbian additions of the past few years. Shit like this https://forum.armbian.com/topic/14469-odroid-n2-single-cpu-handling-all-the-interrupts/ is Armbian's future.