I’ve run my SPU Royal N at ~3g and on my worst wavy warped records it’s failed to leave the groove or even produce audible mis tracking. As I mentioned above My arm in its heaviest form has an effective mass of 18g, the cartridge and adaptor weigh 15.7g and the quite long brass screws a bit over 2g so there is around 36g countering the 8μm/Nm @10Hz compliance. If the cartridge is becoming airborne then there’s a mismatch. My Decca Maroon in the Aro would be an example of the latter and that did leave the groove without a bit more mass at the headshell.
As the VPI arm is in hand put it to the test before contemplating replacing it, assuming you do your own setting up and you’ll gain experience. It at least gives you a baseline.