It looks like this:
https://www.thedrive.com/news/31274/more-teslas-on-the-road-...
https://thedriven.io/2021/06/30/tesla-owners-line-up-at-supe...
It just means there need to be more chargers. North American charging infrastructure is fractured between the open CCS standard and the propriety Telsa plug. It would be much better if North America standardized on CCS so all EVs can charge at all chargers. At this point it just means Tesla needs to switch to CCS.
Europe has more sensibly standardized on CCS Type 2 Combo. All brands of EV can charge at all chargers on all charging networks. And even Tesla is slowly opening their chargers to other brands.
If more people had EVs and charged at home/work/the mall/the grocery store, there wouldn't be a line waiting just to pump gas. They wouldn't be waiting to pump gas, their cars would have already been fully charged at home or their cars would be charging in the parking lot and they'd be in the store shopping instead of sitting in their car burning fuel running their A/C or heat idling in line.
Costco might implement chargers at parking spaces as a convenience thing, but if they do it for free they'd have to do it for all parking spaces to prevent people fighting over spaces. I have no idea how such a large-scale charging system could be retrofitted into an existing car park. Seems more likely that if supermarkets etc did want to implement charging in their carparks, they'd install a few and charge a nominal amount.
It seems like there's a lot of work to be done to scale this up for when electric vehicles get more popular. Many apartment complexes I see have no facilities for this, for example. But electric vehicles are also quite rare in this area.
There would be zero lines to charge, at all.