That's entirely up to them. They've blogged that 6.2 as LTS and announced that LTS branches won't be public until they're a year old. Why would they make 6.2.0

That's entirely up to them. They've blogged that 6.2 as LTS and announced that LTS branches won't be public until they're a year old. Why would they make 6.2.0 a public FOSS release and then withhold 6.2.1 for a year? And even if they did, would you want to use a .0 release on your project? No, it seems likely to me that 6.2 will effectively be closed source when it's announced, and open source releases will follow after a year.