ARP is not an issue at smaller scales, but at larger ones it can cause problems. Reducing the L2 broadcast 'blast radius' is one of the touted benefits of EVPN (which use may be worth considering once you get above ~20 switches):
Saw this in IETF already but it's not clear why it's useful especially as the old path still needs to be implemented for compatibility. TFA is obviously LLMslop, which is very disappointing from RIPE.