Then Jet2 are better of keeping the aircraft they already have! No leasing costs! keeping costs and fares as low as possible! leasing aircraft would just put a bigger strain on them!
A seat on a plane is a seat! weather is a brand new Ryanair 737 or a 20yr old Jet2 aircraft in my opinion! who takes that into account when booking a ticket! its the cost of the ticket and the way the airline treats you, that i look at! Jet2s planes go tech yes but so do new aircraft! Every airline suffers tech delays! just cos Jet2s aircraft are older, they still look ok inside and do a good job! All down to good engineers!