I don't think anyone's warships are problem free they are modified, updated and improved throughout their lives even modifications fail to achieve the previous edition. The Daringclas may have problems but they are not all welded to the dockside, some have deployed to the Eastern Med and the Gulf within the last year.
Many problems exist these days because the designers no longer have experience in operating the ships or actually anything, everthing now is based on efficiency and longer periods between servicing with no actual testing of the equipments capability of achieving that service life just a computer model based on a program written by a progammer with no practical knowledge of the equipement. Despite long intensive testing i.e running 24 hrs a day 7 days a week for 6 months doesn't show up stop start cooling heating in real life, in the case of ships this can't be done, you just hope the equipment works when in situ, it sometimes doesn't, how many cruise liners report problems on maiden voyages and carry builders representatives for months sorting them out, but these are cruise liners, yes they cost the same as a smaller warship but are not government owned and are not newsworthy. Remember George Brown ordered both the carriers and the Darings they were designed to an impossible to operate build budget as cheap as possible to give the impression they were affordable and crewable when manpower was being reduced.
There done it that's my rant today
