[somerandomqaguy]

Probably not. Heating steel doesn't cut it, it just forms a puddle of molten metal that will cling to the base material. For cutting to work, you need to blow it off somehow.

For plasma and oxy-fuel cutting, the hot gases coming out the nozzle acts as the mass that blows it off. Air carbon arc gouging uses regular compressed air to push the molten material away. I imagine industrial laser cuttings dealing with anything larger then a few millimetres thick would use compressed air as well.

I doubt a smaller more efficient laser is going to change that reality.