On the reliability front of chargers...
Those of us who have been EV'ing for while chuckle at this! Newbies worry about Rapids being online - on the day! Only one year ago we would have been happy to find any charger, anywhere! We would ever drive 30 miles, off route, to snatch a blast on a Rapid and when it wasn't available (like Retford, Notts) you were up the proverbial 'creek', without the proverbial 'paddle'!
Of course that doesn't really answer your question; however, its maybe (in reality) the best answer you will get!
The evolution of the Rapid Charger Network has been fraught with problems - some technical some organisational. For sure you will never get any information on availability date, or repair date!
You just have to make the best of what's available, on the day! It can only get better!