British is OP and need to be nerfed, it is a consensus of top alliance, but anyway, it is not related to this topic.
As I said, it is personal opinion, I able to keep my planes for more than 20 battles (my longest record is 5 days, probably more than 100 battles)
And sometime, I feel tired to raid in a row for 2-3 hours, It is a nice break for me to take a rest when lost a plane