Comment by pfdietz

> if by "now" you mean schedules proposed by all those fusion startups

No, I mean the impossible economics of their schemes. For example, the ARC reactor is about 40x the volume and mass of a fission reactor of the same thermal power output. It cannot possibly be competitive as a source of heat with a fission reactor. And fission is not competitive with renewables. So fusion is doubly cursed economically.