Said it before, but keep in mind how used to Star Wars we all are. I was in school when the special editions were released in the late 90s and people who had barely heard of these movies still went wild for them. I know things have changed a lot since then and now, but they'd also changed a lot between 1977 and 1997.
Not saying changing times isn't part of the problem, but most people who are even just casual fans have now seen the originals more than once or twice, and I'm betting most people on this thread have seen them considerably more than that. We know every twist and every line of dialogue almost by heart, so of course much of the impact is gone. I no longer laugh at shows I've watched a few times because I know all the jokes - that doesn't mean they aren't funny.
Worse, these movies have now been bogged down by pop culture and additional projects. Yoda has been used to sell everything from cereal to phone contracts, and we've seen Vader competing in dance offs at Disneyworld. I know some people like the Star Wars movies and shows that have come out since the originals, but I'm not sure anyone likes all of them, so we've all been massively overexposed to this brand to the point that it's honestly become a little annoying.
Now compare Star Wars to Indiana Jones. Obviously Jones didn't rely as much on special effects, but it's still very much a movie of its time that remains exceptionally exciting today, and Raiders was only released a few years after ANH. The major difference is that property has been (mostly) left alone.
