We use gravity batteries in the UK. They work well and are pretty good at their efficiency. When you are creating massive systems they are made to last decades. There is always upkeep but it is the same with coal, gas and nuclear plants. All these renewables are far cheaper and far more cost effective than these power stations and for years the main problem has been that wind and solar cannot be used as base load, but with battery storage on a mass scale, thermal and hydrogen storage, we are now at a place where building out far more solar and wind than we need is viable and mixing in these technologies to provide base load and grid stability.
Nissan EOL’ed all their remote services blaming the 3G turn off. But yet my Leaf still connects to their services to report my driving location and driving style to them. They just turned off any features I could use. The 3G network in the UK will be up for quite a long time still and the 2G network will be around for longer, but they decided it’s a good excuse to save some server money on cars that are less than 10 years old.