Not quite true - a UK photocard licence is only valid for 10 years before the photo needs updating. However, the right to drive remains until the expiry date(s) shown against the categories.
(Edit: the OP of that quote has since edited their post to correct that error).
Also not quite true. In France you have 12 points to start with & offences remove them until at zero you can no longer drive.
When changing to a French licence beware losing categories you may have had on your UK one. B+E is particularly likely to disappear, which could be troublesome you want to tow a large caravan or trailer behind a category B vehicle. Since earlier this year it is no longer necessary to take a medical to retain your B+E.
If you passed your UK test before 1997 you will have automatically had class C1 (vehicles up to 7.5 tonnes gross) included but this can only be retained on a French licence by taking a medical (equally true of proper large goods & bus categories C & D).