The mainstream approach toward commercial fusion reactor has major "show-stoppers". This page summarizes problems discussed throughout this website.
Fusion power only really makes sense if it has clear advantages over fission power. Fusion advocates claim this is the case, but this page summarizes the arguments that fusion has, in fact, no significant advantages over fission.
The final conclusion of this website is that nuclear fusion commercial reactors will never be competitive with nuclear fission reactors. For this and other reasons commercial fusion reactors will never come into service.