[WBEL-users] Upgrading WBEL3 to WBEL4

[iron monkey]

I know the WBEL4 isn't technically released and I know that it may be
to soon to share insight, is it going to be possible to do a 'yum
upgrade' from WBEL3 to WBEL4.

Is an upgrade like this even possible from RHEL3 to RHEL4 using up2date?

I'm just curious...  Getting a box or two out there and I'm just
trying to understand my downtime possibilities...

TIA.