> Life-span of a baby monitor is couple of years, by definition.
Unless you have more than one baby. Or friends/family with babies. My nephews are using products that weren't even new when I played with them, decades ago.
I have a four year old monitor that's on baby #1 in my household. It's a dead simple device and just works. I overhwelmingly care about its reliability to work or tell me when it's not working and I'll easily sacrifice any hackability to achieve that.
Ever have an infant crying for 45 mins because the monitor failed and you thought he was still sleeping? Really really upsetting.
Unless you have more than one baby. Or friends/family with babies. My nephews are using products that weren't even new when I played with them, decades ago.