We still use the dipstick and keep track of engine hours since last fill in our fuel log. That helps us know whether the engine on average is consistently burning fuel, and offers a good guess of tank level so we don’t have to measure often, which of course, is a messy job.
We did make a capped PVC pipe dipstick holder to keep the dipstick clean, and the storage area free of diesel fumes/smears.
Ive bought WEMA for fuel and water, Ive rigged them up in my workshop to check that it all works, looks good and easy to understand system. Im putting both on switches next to the gauges. FW in galley, fuel obviously in cockpit.