Oh- this is all good news.
My 5 cent about the CRF: you know Filou (who is 12) has CRF now - and it's not just the early stages- for 2,5 years and is doing well. Our vet who came to dinner two 2weeks ago says she thinks it will be years for him. So nothing should prevent sweet Max to reach the age of Samantha
Dental: Filou having CRF should not be anesthesized but in these 2,5 years he needed dentals two times because unfortunately he builds a lot of tartar and when his gums hurt he stops eating and with the CRF he cannot lose weight. So he got these dentals with as little and as weak an anesthesizer as Trude (the vet) could manage. He woke up in the first half hour after it and has always been fine. It's always a choice between difficlut options but I also think clean teeth is life quality for an elderly cat.
Give Max some kissies from me and take a hug