Cost
Smug environmental benefit ( DH calls the petrol car the planet killer)
Mechanically simple, no oil, air filters to change etc not much to check over
Regenerative braking, brake pads don't wear out as they are rarely used
Quiet, you do tend to creep up on pedestrians and cyclists, but you get used to it and adjust your driving accordingly.
Unbelievable acceleration ( will beat a sports car off the lights) - astounding torque and no need for gears
Not tiring to drive, especially easy in traffic. Very big benefit imo. The simple controls,no gears and in-cabin silence all contribute
You can do long distance, you just need to plan a bit. There's a good video on John o goats to lands end using public charge points. We do MORE long distance in ours, because it's so cheap, and smug.
Great for in cities, no congestion charge, and many towns and cities where parking is very expensive, or short stay only you can park right in the centre and charge all day for free or very low cost. Again, We visit more tourist cities than we ever did because of this.
Being part of a community in a nice old fashioned way. Whenever we stop to charge at a service station you have a chat and compare notes with fellow ev drivers, or get interested petrol car drivers asking questions. Fellow ev drivers are usually very helpful.
So, no no real benefit ;)