A long delay between FW updates is an entirely different thing than End-of-Life'ing a device and dropping support.
(And both sides of the fence have done the former -- except it usually comes as a blessing when it's Amazon, because it means that stuff will keep working as-is for a little while longer ;p).
Hell, you can apparently still update the original
Kobo Touch to the exact same FW than the latest Forma is running.
Whether said updates come in what might be considered a timely fashion and whether they actually fix issues or add new ones, that's an entirely different can of worms
.