Same here, ours was installed in 2011-2012 and the contract transferred to us in 2019 when we got the house, so we've got a good 16-17 years left, by which time I would hope the battery and generation technology would have evolved significantly.
I believe the FIT dropped for systems installed after 2019 to about 5p per KW compared with old tariffs from 2011-2012. So in my opinion the only way to make it worthwhile would be to install it with some kind of storage.
Funnily enough I thought would increase the cost, but installing a system with panels and storage is actually cheaper then it was to install a generation only system back in 2012 looking at the receipts we got with the house.