Except when stellarator starts doing longer runs and requires more hardened materials (like ITER) and when we need more instrumentation in the containment walls

Except when stellarator starts doing longer runs and requires more hardened materials (like ITER) and when we need more instrumentation in the containment walls (like ITER) and when we need to actually plan to harvest energy from it (like ITER) and somewhere at that point someone proposes yet another concept for fusion reactor, modern and not dragged down by all that "practical" stuff. Also fusion is not 30 years away, it is likely more, after ITER we'll have DEMO, that would take many years again and only after that we may have first practical reactors running.