See, here's what's really depressing:

We have far better technology now than we every had in the past, and in theory it should have led to far greater variety and creativity because it has made so many more things possible. But in reality, all that's happened is that development costs have increased so much that people think it's too dangerous to risk money on a new idea and there's less variety (at the top of the pyramid) than there was decades ago.

in recent years I'd agree, but 2017 has been great. John Wick 2, "Get Out", and Logan all were superb

Not for a long time. Even though they're all super hero movies. They aren't Iron Man 1-35. They're different characters. And they're many left that people want to see done. I'm not saying you're wrong. There are a ton of SH movies. Only because there's a ton of them, to actually make. Spider-Man and Hulk are the only exceptions to the reboot issue. Due to them screwing up various ways.

I'm still waiting for the two in my avatar, to have good film runs.

many times big properties are forced to reboot if they can't get a sequel because the studio needs to release a film every now and then to retain rights.  This was the case with the last Fantastic 4.  Spider-Man has a good reason to reboot this time though.  Previously he was owned by Sony and the Avengers Marvel characters were owned by Disney.  So they couldn't play together.  Disney worked out a deal to share the property after the critically panned Amazing Spider-Man 2.  Sony didn't want to continue or reboot again just to retain rights.  So they and Disney worked out a deal to let Spidey play with the Avengers however they needed to not carry the baggage of the Garfield movies since those were never disigned to fit the Avengers timeline.

1. Because that's what people go see.

2. "superhero" is hardly a narrow genre.  In superhero films there have been heist films, space operas, spy thrillers, character dramas, war movies, shakespearian dramas, etc.  There is great variety within the genre.  Is the Dark Knight similar to Guardians of the Galaxy?  Is Ant-Man similar to Logan?  Is Iron Man 3 similar to Captain America Winter Soldier?

Seems to me actually we're seeing a resurgence lot of lower budget films doing well

Get Out - $140 million and counting on a $4.5 million budget

Hidden Figures - $215 million on a $25 million budget

John Wick 2 - $158 million on a $40 million budget

Lion - $126 million on a $12 million budget

Split - $257 mill on a $9 million budget

La La Land - $427 million (wowza) on a $30 million budget

Fifty Shades Darker - $374 million on a $55 million budget

About ten years ago I stopped watching mainstream movies with few exceptions - now it is just older movies and few lower budget movies here and there.

I like Star Wars. That's usually all I go to the movies for. The rest are what my gf bring me to XD

Sure they are. They give us one DC/Marvel after another. It is getting boring.

No. People who say that dont understand that Hollywood makes movies that are GUARANTEED to sell. So reboots remakes, sequel, prequels etc. There are ideas that just don't have the funding to be supported because well they get overlooked.