Weight & Balance during takeoff and landing with reduced fuel quantity.
If we look at it very soberly, without all the bogeymen á la “if something happens then it’s on you” and “ohhh, the insurance will be pleased” or “grounded after a ramp check”: When does this really become relevant for us VFR pilots?
Typical charter and club aircraft with wing tanks (near the CG) have virtually no CG shift.
That leaves fuselage tanks as a “little problem”. But here you know after the third W&B calculation that when landing solo you should still have x litres left.
I think in 95% of cases this is (for us) more of an academic issue.
@KaBaPilot This is absolutely not meant as a judgement of your post or you as a person. Just my personal opinion on the topic