In our environment we currently have one PRTG core server and 3 remote probes. The core only has its own 6 sensors. In total we have about 2500 sensors, distributed on those 3 remote probes. In the near future we will further add 1-2 remote probes and might get to 5000 sensors in total. According to the manual it is strongly recommended to use a hardware installation for 5000+ sensors. Does this apply if the core only holds remote probes? Where is the performance issue in this case?