That's a shame but I guess something we'll see more and more to former lamp plants in the US and Canada.
Surprisingly, the front office part of
GE Oakville remains to this day, although the rest of the plant has since been long demolished. Not sure what the plans are for the site though. It's been abandoned like that for almost a decade now. Would be nice if that block somehow got incorporated into a new facility.
As for the former Sylvania on 1 rue sylvan in Drummondville, I believe it's still there, and being used by Canimex.
See here (French)