I have barely ever seen an air conditioner where you can change the temperature in .5 Celsius, it's usually jumps of 1 degree.Every digital thermostat I've seen has 0.5 steps in Celsius. Just take a look at any car with I can tell the difference with ease in home heating and cooling between 0.5C steps, and use them often. I grew up with metric measurements btw. and still use them as they are drilled into my head. But I see some benefits of imperial and why people would prefer that.
I like the finer granularity of Fahrenheit scale, because its 0-100 range is optimized around livable human-centric temperatures, and not third of it 'wasted' on temperatures that would kill you in an instant.
Either way, weather forecast almost never gives you decimals, and when you say the temperature nobody is like "oh, today it must be like 28.5 degrees!". I'm only talking about everyday use for most stuff, not things like trying to boil something, cook or whatever, obviously
I see some people argue that you need the decimals with Celsius but that's outright false on most everyday uses.