Currently there are no other solutions for freezing batteries. The usage is not a lot. So many years of EV expanding their numbers, and the only time I saw a picture of a Tesla being recharged by the roadside is here recently on GAW.

Most people with money to buy EVs are at least upper middle class. These folks will get into trouble less (but many still managed to kill themselves using Autopilot.) If they don't have a second car to use in poor winter weather, then a rental is an option for a long trip.

Everyone on EVs? -- not going to happen for a long time. In some (or many) countries they may need to rewire neighborhoods to allow you to fast charge. In the UK, they are proposing legislation to control charging times (illegal for you to charge during peak hours). So you see, electrical grid problems will dominate way before everyone ends up with an EV.