Yeah 
Just trying it out. Just one quick thing maybe worth mentioning
When I restarted Eclipse after RC3 Update (via Help / Install new software / Update Site), I saw the Eclipse Splash Screen for about 4 minutes. CPU was spiking to 1000% in Activity view. At first I thought it crashed, but then Eclipse opened. After that 4 minutes of nothing but high CPU, everything seems to run smooth. Even after nexxt restart (was about 10s as usual again) everything is fine.
Bnd Workspace with 54 projects, Macbook Pro 16", 8 Cores, 32GB RAM, MacOS 11.6
Maybe there is some kind of initial heavy convertion of pre 6.x to 6.x going on in the background. If this is the case, maybe you could mention it in the Release notes.