Dryer plugs tend to barely get used, so they should be OK most of the time. The frequent disconnects will wear them out and eventually the contact resistance goes high enough the pins start to overheat and melt stuff. This most likely will be detected by the temp probe in the mobile connector if that's the unit that's plugged into that receptacle. If an additional box or extension cord is used this of course won't work anymore. I'd expect that plug is fine, as long as its snug when you plug into it that's about all you can do. An EV with a large battery can be charging for a long time and run a plug at full load the entire time, so its the worst case more or less. The plug will likely be warm after a while, but it should never be hot to the touch. It's not really a big concern, but these are things you should probably be aware of. Replacing that panel will almost certainly be over 1K. The lowest I could see someone charging is maybe $1200ish, more likely would be in the 2's. It should be fine, but you don't appear to have the capacity to reasonably add on a high power charger. You most likely have 100A service feeding the house, so that would need to be replaced to run a 48A wall charger. That's several thousand easy, and can be quite a bit more depending on the location.