I haven't run a fully remote shop, but I've worked at many since 2015. Your hiring pool is bigger because you're not limited to commuting distance. You don't even need to be in the same country (although going multinational does open a taxation and labor laws can of worms).

It feels easier at smaller places because you can either start from the ground up that way, or easily pivot to it. Rent, utilities, furnishings etc can cost a surprising amount for a small business, which is why so many of them shared offices or used co-working spaces before the pandemic.

But make no mistake: some people just work better in person, and others work better remote. You should just choose one and stick with it. With hybrid you mostly end up with an office that's almost empty all the time, and lonely in-person types working there.