Hello All, the only question i have today is , how many clients can a Mikrotik Hex handle ?
There is no clients limit in mikrotik devices but yes tunnel limit by license. Your device is Level 4 and support up to 200 tunnels of each kind (200 PPPoE, 200 PPTP, ...)
The performance depends of how device is configured (router / bridge) and how many rules (filter, mangle, ...) have created (this cause CPU usage). More rules more CPU usage.
Go to
https://mikrotik.com/product/RB750Gr3 and read at bottom how many throughput gets in every configuration mode (bridged / routed)
I hope this helps you.