What are benefits? Are they bigger than security problems? No software is 100% safe and cars are considered "critical equipment" - no for cars or medical equipment in "the cloud". But ofc, your mileage may vary.
Seriously though. This comment is very true. Cars are "technical" enough as it is (ie onboard computers that can make servicing/repairs more troublesome/expensive).
Why on earth would anyone want to compound that with "the cloud".
A) what possible use is there for having my car connected to the Internet?
B) you realise that "the cloud" as used by most people today is just a marketing gimmick term for hosting shit on computers someone else controls, right?
C) In the traditional sense, "the cloud" is the network connection between a client device and the servers it's connecting to: eg the last mile connection, ISP wan, peered ISPs/etc all the way to the data centre.
Still, I do not believe anyone would easily accept any cloud connected (or cloud-like) car. First there are many other problems that humanity need to solve before jumping into such complicated matter.
[0] https://www.wired.com/2015/07/hackers-remotely-kill-jeep-hig...
But really, provide some more info, what does the platform offers, what exactly do you mean by a connection etc.
API services (parkermeister.com, idrop.in) that bring value to this experience will be immensely useful.