I suspect I might be decommissioned in around 20 years myself.
The leaders are aiming to bring the submarines into service at the earliest achievable date which I hope will be sooner rather than later.
The main problem with the Attack class was that there wasn't a final design and it is quite possible that the capabilities expected for that boat were never going to be deliverable.
Both the the US and UK designs are mature and provided we don't naff around too much with them I can't see why there should be any great delays in bringing them into production. The main problem will be the learning curve but really, apart from the nuclear bits, it probably won't be much more complex than a conventional boat.
I see the UK has announced preliminary work of replacing the Astute Class.
BAE, Rolls-Royce and Babcock will design a new class of nuclear powered attack submarines for the Royal Navy to replace the Astute class - currently referred to as SSN-Replacement (SSN-R).
ukdefencejournal.org.uk
Announced a day after Australia said it wanted new subs. I wonder if that is a coincidence.
Actually I hope Australia just sticks with the existing candidates and doesn't get sucked into signing on for a paper boat.