The main benefit of nuclear is its relatively low carbon footprint and in theory less risk of spiking fuel costs because we run out of raw materials. That's the dream of fusion anyway.
Nuclear power infra is not cheap and even fusion will have security and decommissioning costs.
Forget cost as the main factor, grid power will never be free. That's a fantasy - even publicly owned utilities will/are funded by taxation. You're paying for price and power stability. Domestic fusion means you don't need to rely on foreign resources (eg Russia cutting off the gas).
Putting renewable generators in your home has a high capital cost, but people forget that you're also cushioning yourself against grid outages. It's insurance more than anything else.
A fusion reactor the size of a shipping container? Plop one down between my neighbor's house and my house. Right where our backup generators now sit. It's about the same footprint.
No more distribution costs. Well, except for Amazon's fees to drop off the uranium now and then. :)