The longevity of the VF battery depends on many things, foremost among them being your driving. Beside that, little things can have a big impact down the line.
If you drive only 5-10km to work in slow moving/stop-start traffic, and return in the same conditions at night with lights on, in effect the battery is not receiving a full charge by that driving. At least once a week there should be a sustained open road drive over 1-2 hours to fully charge the battery. The more often long trips are done, then potentially the longer the battery will last. Repeated short trips will not charge the battery, with load from headlights, radio, etc. and poor driving decisions conspiring to shorten battery life, in some cases 3 years. I expect I will get at least 6-7 years with my battery, knowing the car's previous driving history that did not include any city/suburban driving.
At the time of trading my old VZ in last November, the battery had been in place for 8 long, trouble-free years. It had been given a cadmium additive when I first bought the car, and nothing else was done other than heaps and heaps and heaps of long-distance, sustained speed driving in all conditions from freezing cold alpine environments to blistering heat of outback central Australia and the Kimberley. The battery in that car was only found to be on the way out during a routine load test in August 2019!
Yes, the VF is full of electronics, but it can look after itself. I note a bizarre post here recently about a gripe with the owner's radio cutting out after 10 minutes while the owner wanders around outside. The 10 minute time out applies to the radio and the interior blue lights around the door handles. It is in place to stop unnecessary drain on the battery. Other ways to waste the battery are pulling up somewhere at night and leaving the headlights on while chatting on the phone or sleeping in the driver's seat with your foot on the brake pedal! Seen it all...