Sainz should have been in that Red Bull seat.
A lot more mature than Verstappen and very cool and collected both on and off the track. He would do well in a top team. I think Verstappen needed a bit more time
How can you say Verstappen needed more time when he has done nothing but deliver since moving to RB.
He won in Spain - conspiracy theories aside, he put in a monster final stint to make that strategy work.
He finished second in Austria, and again, put in a monster final stint, holding Kimi at bay.
He demonstrated his prowess in tricky conditions at Silverstone, showing he was one of if not the fastest car on track until things dried up enough for the Mercs to make use of their power advantage.
His only "immature" moment has been his crashes in Monaco. The only thing I say to that is that he's definitely not the first driver to crash in Monaco because he pushed things a little too far (I remember a certain Brazillian doing that one time...)
I'm not saying Max is the next greatest thing since sliced bread, and I'm not saying he's "a gaurenteed future WDC", but he has more than put up the results to justify the move.
There is no concrete evidence that suggesta Sainz would be achieving the same results. All there is, is noise on the Internet.
Also don't forget that there were rumors of Max switching teams
before Russia, since it was part of his 3 year deal that he signed in 2014. Either he was in the big team by the end, or he was an unrestricted free agent. You'd be mad to think that RB would simply let Max walk away to Merc or Ferrari.
In regards to
@CLowndes888's theory about Kvyat crashing on purpose in Russia and RB purposely ruining Ricciardo's career. Absurd!
Redbull
orderes Kvyat to ruin his F1 career by crashing on the opening lap of the Russian GP, just so RB had an excuse (even though they didn't need an excuse, they can do what they want, it's business) to move Max to the big team with the ultimate goal being to ruin Ricciardo's career.
That's suggesting that RB are willing to spend 10s of millions of dollars developing drivers just so they can ruin their careers.....
I love a good conspiracy theory, but this one has more holes than a cheese grater.