Hard to believe the TV landscape has changed so much in just four and a half years since "The Tonight Show" went through its last (brief) host transition.
But the environment that Jimmy Fallon is diving into starting tonight is even more intense and more immediate -- thanks to the bullhorn of social media -- than what Conan O'Brien faced in his June 2009 premiere.
Scrolling through Twitter and Facebook, there's an undeniable sense that bizzers are rooting for Fallon to succeed. "The Tonight Show" is more than a latenight television show -- it's an American institution, and Americans -- even those who work in Hollywood -- want their institutions to be healthy.
Here's a sampling of the reaction to Fallon's "Tonight Show" debut:
A meeting of the minds at @FallonTonight - @StephenAtHome @JoanRivers http://t.co/zDu92BP1zR--
Judd Apatow (@JuddApatow) February 18, 2014
Don't say this often 'bout show biz folk, but really pulling for @JimmyFallon! Get after it, man! Johnny's diggin' it!--
Jeffrey Wright (@jfreewright) February 18, 2014
Just watched the Tonight Show w/ @jimmyfallon.
Jon Lovitz (@realjonlovitz) February 18, 2014
Looking forward to premiere of JIMMY FALLON'S TONIGHT SHOW Tonight, and tomorrow with guests Jerry Seinfeld, Kristen Wiig and Lady Gaga.--
George Shapiro (@georgeshapiro) February 18, 2014
I bet Jimmy Fallon could do a perfect Jimmy Fallon impersonation.--
Richard Roeper (@richardroeper) February 18, 2014
I can't wait to watch #TheTonightShow with #JimmyFallon! What are you gonna wear? I'm wearing a robe and my Tigger the Tiger slippers--
Chris Kattan (@ChrisKattan) February 17, 2014
Just me or does the new Tonight Show set seem tiny and the set dec cheap looking?--
Shawn Ryan (@ShawnRyanTV) February 18, 2014
He's "more sophiscated...really bringing back the charm of the Carson era." A buddy saw #JimmyFallon in his NYC #TonightShow debut.--
Bobby Rivers (@BobbyRiversTV) February 18, 2014
. @JoanRivers on #TheTonightShow after years of being banned by Carson.Says everything you need to know about how awesome @jimmyfallon is!--
Lenny Jacobson (@Lennyjacobson) February 18, 2014
Congrats to Jimmy Fallon. Just 4,609 more episodes to go.--And just to underscore Fallon's regular-guy image:
Dave Itzkoff (@ditzkoff) February 18, 2014
In honor of #FallonTonight, throwback to that time my dad unknowingly got drunk with @jimmyfallon http://t.co/1YRnqc0ALd--Related storiesJimmy Fallon's 'Tonight Show' Future: Three Things To WatchJoan Rivers Returns To 'Tonight Show' After Decades-Long BanJimmy Fallon Premieres 'Tonight Show' in New York: 'I'll Be Your Hostâ¦For Now' 2014 Variety Media, LLC, a subsidiary of Penske Business Media; Distributed by Tribune Content Agency, LLC Copyright © 2014, The Baltimore Sun
Kyle Leopard (@kyleopard) February 18, 2014