@tsarstepan,
Yes I think we should. As well as the rest of the metric system.
As a kid in grammar school in the 70's they made it sound as if the switch was imminent. We learned the metric system and around that time product labels began including metric weights and volumes. It seemed as if this was a big deal and everyone was on board and then it just fizzled away.
I have cousins in Canada and they made the switch around the same time. It took some time but they got used to it. Now when cousin Frank tells me a story about how hot it was last summer while he was building a deck he very naturally says it was 35. I do a double take and then quickly do the conversion.
We should join the rest of the world and just do it.