Doesn’t matter to the D-Link bean counters. Either case is a non-sale to them. Never mind that they tank whatever is left of their already terrible reputation, all they care about is immediate shareholder revenue generation, and spending money maintaining software for older hardware is a loss to them.
I’ll make one exception for audio messages: the other person being in a situation where they cannot easily type the message, but it’s not an emergency. Hands full, driving, inclement weather, etc. I take it as an implicit “this message is important, but not drop-everything-else critical.”