I don't think it's an easy accomplishment
I think it depends on how the year goes. There are sometimes roadblocks or choices that are inevitable and we miss days, even if we are consistent otherwise. Proof of that is 2023 for me, with only 2 days missed.
I don't think I can go a year without missing. Most of the time it's either I don't because of a serious illness, or I have family responsibilities. The be able to go 365 is unimaginable resilience
Yeah, in my goals, I set 350 posts per year for the same reason. I don't start with the assumption I would be able to carry on for the entire year without missing a day. As you said, it can be illness, other responsibilities that are placed before Hive, or even vacation time (I haven't had a proper one in a while).