Not all uses of VoIP are done with software clients, mind you. I manage SIP setups for myself at home as well as at my aunts shop, both of which have physical

Not all uses of VoIP are done with software clients, mind you. I manage SIP setups for myself at home as well as at my aunts shop, both of which have physical IP phones instead of softphones. While softphones are certainly useful, most people on a VOIP service of some kind are probably more likely to still use a physical handset, headset, or proper conference phone where echo cancellation is less of an issue since it's either handled by the hardware itself or non-existent in the case of users on a headset.