They won't do another reboot right now but I'm dead sure they will in the 2020s. They'll have a third version of Kirk and Spock... and I'm not talking about Discovery. A third film version of the characters.
They've done it to Bond, they've done it to Batman, they've done it to Superman. They've done it to any characters who last long enough.
If TNG hadn't been around, we'd already be on a third version of Kirk and Spock. TFF would've been the last of the original films (TUC only exists because TNG kept interest in Star Trek around long enough for Paramount to want to do a 25th Annivesarry film), they would've rebooted Star Trek in the late-'90s or early-2000s, it would've run its course (how long these films would've lasted and how good they would've been doesn't matter and would be pure speculation); then sometime in the 2010s, a third version of them would've been introduced. There will still be a third version, it'll just happen later than it would've.