You may be in minority here as someone who started with Legacy. Most here started with something before Legacy came along, in fact before any type of command control even existed. Some want the best available and gradually sold off their older trains but for many, earlier command control systems or even conventional is good enough.
I too am OK with good chuff and whistle so TMCC is fine with me. If an engine comes along that has never been made before that would be reason to consider it, not the fact it has Legacy control.
Pete