Letting alone what the national regulations may say about training time limits, from a practical standpoint, they're stale. Earning a PPL is a step along the way toward being a good pilot, so don't count the hours, so much as the skills mastered. Those hours might look good continuing from in a log book, but for any other purpose they're not much use... If you had a PPL with them, they'd still be stale if you wanted to rent a plane....