We removed the OEM gauge and connected the tank sensors to the Cerbo GX analog inputs. The CerboGX is connected to the N2K network and sends the levels throughout the ship.
Like others have said, I'll keep my simple resistive floats for as long as they work... We did have to replace the holding tank sensor after 24 years. The other neat party trick with the Cerbo GX is you can calibrate the sensor resistance to the shape of the tank, making them quite accurate. Our fuel tank is within 1-2 L. Our fresh water tank runs out about 20 seconds after the Cerbo GX says it's at 0 L. You just need to figure out the shape, spit that into AI along with the resistive limits of the sender (full / empty) and it will spit out a correction chart. For the fuel tank, we tweaked it by refuelling.
For LPG we use a wireless bluetooth sensor, which also goes to the Cerbo GX.