First post here, so treat me gently

I have an old (6+ years) Centos 5 server that's long overdue an update.
It was initially set up by a colleague who's no longer here, and my initial dabblings with Centos 7 left me more confused than when I started.
So I've fired up SME Server 9.2 onto a test rig, and was very pleased as to how simple and quick it was to get something up and running ... so great job !!
However, I see that 9.2 is EOL in 2020, but 10.0 is only in Alpha.
If I install the new server using 9.2, will there be an update path to 10.0 when it's released ?
Or will I have to re-install 10.0 from scratch ?
If so, can I then backup/restore my config (and/or data) ?
Thanks in advance for any help
Mark J