i will actually give this topic a serious answer.
based off the last 3 years represented in this image:
if no external factors change...
* Daybreak Games does not Implode ✔️
* Servers remain at 10 (+2) and are not further consolidated ✔️
* SSG avoids really big changes like they unveiled with HD trait trees, or other things to upset the apple cart ✔️
you are looking at another 8 years minimum (more likely 10). SSG could extend that out by simply consolidating a server or 2, over time.
lets just say hypothetically they whittled the active server list down to one or two servers on each side of the pond (4 max.) that alone could add another decade, or more.
by doing next to nothing, other than using the robust server transfer feature they now have, the game could go on for another 20 years.
my only recommendation... it is more clever than a first glance could imagine... is Crickhollow is the first to go!