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Then why is it continuing to happen? I will probably never watch an all-white tv show again unless it's a rerun.
All white shows stink.
Good job Oscars! Hopefully Asian and Hispanic nominees in 2018!

Nope! If Barry goes the show's ratings will drop as fast as Trumps popularity. Wally is obnoxious and can't carry the show on his own. Besides, people are fed up with blackwashing white characters.

Bring on Joel Gretsch as future Barry.

Who doesn't like Barry? Plenty of Wally and Iris haters. Lose either of them and the show will survive. Lose
Barry and it won't.

Yes actually not Grant's fault but many fans don't like Barry to begin with

Not for me. Grant is the reason i started watching and he will be the reason i leave

Probably not.
Why do you ask? Is he thinking of leaving?

Under the right circumstances.
Wally probably couldn't carry the show, but if they sent Bart back from the future, or introduced cousin Wally, or let Jay handle the lead while they try and make Wally or Jesse a capable lead.
The Emperor has no clothes.

On a character level, it would be possible for Wally to replace Barry as in the comics, but on an actor level, there is no way this show will work without Grant. He is the beating heart of the show.

in theory wally could take over like in the comics. But it might not work on this show

It's hard to continue any show when there is a clear main character or focus. Kid Flash can't replace Barry, and bringing in a different super hero is not the same. Or bringing in a different actor to play the same character rarely works. Only in a true ensemble cast can one show survive, like Law and Order where main characters came and went. Grey's Anatomy has survived with many characters leaving, but it's been said Meredith is the show (by Shonda R), so when Ellen P leaves, the show is over.
I think that only Legends could survive if someone leaves. There is no clear cut major character

Nope.
There is no Flash without Iris West.

The relationship between Barry and Iris is a popular part of the show. But Iris doesn't make or break it. Barry does.

You are assuming that most of the people watching even like Iris and I doubt that's the case!
Just look at these boards. There's only a handful of Iris fanatics. Iris is barely tolerable in her scenes WITH Barry. Once he goes, her crappy character and acting will really start to smell up the joint not being able to be propped up by Gustin's ability.

Not a chance. Gustin carries this show.

Why are you laughing? You're pathetic. Come on now. Look at what your sister is posting. She actually said Iris' sole purpose for being on the show is Barry, but isn't that the point? Isn't everybody, including your faves on there for Barry? Then she thinks because 10 of you hate Iris, and 10 of her fans are on here that she doesn't have more. I'm embarrassed for you.
Stop the madness. And stop laughing. It's not funny, boo boo.
There is no Flash without Iris West.

Iris doth protest too much.

Lmfao. You two are pathetic as Hell.
You b!tches can't get enough of Iris. I love it.
There is no Flash without Iris West.

The question was if the show would survive without Gustin. This is the CW, and as long as Iris stans can go the distance like SPN stans, TF can survive for a loooooooong time. Nowhere did I say the show would be good/watchable for anyone else.
Besides, the seething/frothing over WallyFlash (and Linda!) could be entertaining. It's happening already, and by Iris stans no less.

So we'd be left with Wally as the main/central character and Lonsdale's dubious acting and Iris, whose sole reason for even being in the show is Barry himself. No thanks.

Given this season, especially the last 2 eps: YES.