He needed a break!
An excerpt from an interview he did at New York Comic Con (per Anime News Network):
72 volumes of Naruto. Did the editors of Shonen Jump want you to keep going? Some of the Shonen Jump series go for a hundred volumes or two
hundred volumes. Did the editors want you to keep going on Naruto?
Yes he can, in the manga 16- Vessel.. Boruto is having a match against Naruto and uses water release- billowing wave and mixes it with lightning style. The wiki probably just updates stuff according to the manga as well. Although he might just not use water style as much as wind or lightning.
There is no evidence that Sasuke removed Kurama's memories too. so, I believe Kurama knows everything.
I only remember the first time when Sasuke entered naruto.
Tenchi Bridge Reconnaissance Mission
Sasuke, with his active Sharingan, suddenly appeared within Naruto's
subconscious, which surprised both Naruto and the Nine-Tails. The
We now have the information regarding Boruto's right eye. It is called the Jōgan which translates to Pure Eye.
As per the anime's wiki page (emphasis mine)
The Jōgan is a unique dōjutsu that is known to the Ōtsutsuki Clan, whose members claim it's troublesome and that it's a power strongly inherited from their clan.
In the manga the dōjutsu is ...
As JNat stated in the comments, this is a memorial for Jiraiya rather than an actual grave. Jiraiya's body was unrecoverable at the bottom of the sea, so there was no body to bury in the cemetery.
But given Jiraiya's importance and status, why wasn't he given a proper funeral?
Well, Naruto built this memorial outside the village shortly after Pain's ...
I don’t think so.
Here we see two particle styles/dust release colliding. This means that this jutsu just like other jutsu can be interfered with by strong enough jutsu. Examples being Rinnegan absorption and other Particle styles. Meaning that if a jutsu has sufficient energy it can deflect the Particle style, just like when Rasengan and Chidori clash over ...
To use a jutsu of some nature you don't necessarily need to possess that chakra nature. to do some advanced jutsus you may need that chakra nature. For example, during the Fourth Great Shinobi War, everyone used Earth style to make mud walls just by making the right hand-signs. But Boruto's natural affinity is towards Wind style since he got it from Naruto.