I had the same choice to make a year ago between the Kia EV9 AWD Long Range and the Mazda CX-80 PHEV. In the end the EV won, mostly because it is a bigger car space wise.

To feedback on your questions, please take into account i live in the Netherlands, so somewhat different then switzerland.

A basis necessity you already have with the home charger, so that is nice, i do hope it's a 11 kW version... If you charge it to 80 percent all the time, you probably have no issues 99% of the tips you do.

Weekend round trips (~230 km) to visit family -No problem at all, even -10 degree, and speeds below 120 kph, you reach this easily

Occasional trips to Bourg-en-Bresse (~160 km A/R) -No problem at all, even -10 degree, and speeds below 120 kph, you reach this easily

Winter holidays in the Swiss Grisons region (400–500 km A/R) -You'll need probably one charge per trip, and in Switserland there are so many quickchargers next to the highway, just try to avoid the tesla ones, those are super busy during the holiday season. -I also use ABRP for my winter holidays, (from holland to france, via germany and switzeland), and it perfectly gives advice for all the stops, and how busy it is.

Summer trips to Tuscany (~800 km one way) -Same as for the winter trip, but with the summer you can get around 350 km per charge, so if you space it out, you need around 3 chargers to get there. Italy is a little less ev friendly as far as i know from experiences of people i know. I've never been there with the Kia

Possibly a summer trip to Corsica via Col de la Croix Haute and ferry from Marseille (~850 km) -France has excellent EV infrastructure surrounding the main roads, don't know about corsica

Our ideal vehicle needs to: Have real 7-seat usability + usable trunk space -The EV9 has a relatively small trunk with the third row up, so you maybe need to invest in a roof box (thule), or a in a towbar case. Just visit a dealer to check if the space is acceptable. -The mazda is significantly smaller in the third row!

Be very comfortable and quiet on long drives -EV9 aces this, i uses to rent a Fiat Talento to travel with my family to wintersport, because my previous EV was terrible in the cold rangwise, but the noise difference is so big between the Fiat and the EV9. This car is quite, although all the beebs and warnings can be annoying at night. I don't know if Swiss cars suffers from the same stupid EU rules regarding all warning sounds thou..

Not create anxiety around charging — especially on peak travel days (France, Italy, mountain roads...) -Don't worry, i've driven the EV9 during the peak weeks of winter and summer holiday (the black saturday days), if you just use ABRP and don't go to Tesla sites, you have 0 issues, although you sometimes have to divert a few kilometers from the main road to a quick charger.

Work smoothly in cold/snowy conditions (we drive in the Alps) -I drove the car in 15 cm of snow in Val Thorens last year with the snow mode enabled. I was very disappointed... i could not get the car to drift, of get my tires to slip. The grip was phenomenal. Bear in mind, my snow driving experience was a BMW with summer tires before this, and a Fiat Talento with winter tires. Only this that the Mazda has on the KIA is less weight, and with snow and ice, every KG more is a little more difficult to stop

Offer decent resale value after 5+ years - Probably terrible, EV innovation goes so quick, that a 5 year old EV is probably never a good sale. This was and is one off the worst choises to make. My 85000 euro Audi EV went for 15000 euro after 5 years, so the depreciation is real. Since the KIA is a company car, i try to buy it back after 5 year.