Re: Set a date, and stick to it.
The problem with DAB (and DAB+) is it doesn't work as well as FM. This might seem irrelevant in a discussion of 2G phase out but it highlights a problem with obsoleting older technology -- it not only renders a lot of equipment unusable but its replacement may not measure up to the capabilities of the older technology.
2G is still used by devices that need to be low power that transmit relatively small amounts of data intermittently. As such its actually more robust than newer technologies, just as copper wire pairs tend to be more robust than wireless for low speed traffic so long as the wires are not damaged. Those nascent standards that will duplicate or improve on its capabilities such as LoRaWan have yet to prove themselves -- they may well be the eventual replacement but until proven capable and phased in over a period of many years they're just pipe dreams.
Biting the hand that feeds IT
