It is not about you being comfortable with IM, it is about doing an A/B comparison of the 2 options. You don't know what you don't know, if you don't compare with being in the office then "being fine" does not mean "it's better", it can be worse and you don't know it.
I am working from home a lot for ~ 12 years, I still go to the office from time to time not because I have to, but because it is good to. Those days are a complete waste of time in terms of productivity, sometimes I don't open my laptop the whole day, but they are priceless for other reasons; I talk to people all day long, the kind of discussions you don't plan and send invites with an agenda upfront.