I have to add my few ‘shekels’ again to support oomis. I myself remember very clearly that virtually ALL previous generations did exactly as she writes. Neither PM nor squeak have lived a life long enough to know that. The fact that today we have all succumbed to “chumros” does not make earlier hetterim invalid. oomis is not “mistaken” at all. Nowadays, everyone seems to think that we all have to live according to the chumros of the chazon ish. For thousand years, we have ahd differetn opinions and people lived and acted as per their Posske. The view espoused by PM and squeak-that there is only one legitimate halachic view- leads to sinas chinom and huge machlokes- see eiruv in Boro park and London.
to pashute yid- thanks again for this subect. BTW- your description of electricity is exactly why some poskim think that it is not a melocho- it is like opening or shutting a water faucet and ,clearly, it cannot be the meloch of boneh. Incidentally, even if you accept this view that it is boneh, it si muttar on yom tov, see Shabbos 95-1 and tosofos “Horodeh”