These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Idiot Plot: The only way half of the situations in this movie are able to happen is because people behave like brain-dead morons who don't know what the word "fire" means. Of course, this is how many people behave in disaster situations in real life, so it is arguably justified.
Seinfeld Is Unfunny: Considering how this was made in the 1970s, one can probably see it now and wonder why the hell modern conveniences we have today aren't being used. The elevator scene and several action stunts probably look incredibly corny. Heck, even the concept seems pretty stupid today.
Though, there were a few comparisons made between this movie and real-life events when 9/11 occurred.
Tear Jerker: Lisolette's rather thankless death even bothered test audiences, though it sets up a very bleak Downer Ending for another character.
The firefighters taking heavy casualties and fatalities, and yet they can't fight the fire effectively.