Probably many people would say that their cellphones are the most important piece of technology. However, I think that we have some objects that are most important or sentimental.

I knew the electrics ovens when I was 10 years old when my uncle gave to my mother a electric oven because in winter she couldn't cook bread in the tin oven.
I start to used this object about two years ago, because I was very interested in the cook of sweets, so now sometimes I cook cakes, cupcakes and another things. I really like to do that, it's a very good distraction.

If I don't have the electric oven, probably I can't do cakes in winter because the rain extinguishes the fire in the tin oven, so we only can eat this type of things in summer and I like eat it all the year.
So yes, I like my cellphone, but I love my electric oven.