When navies moved beyond protected and armoured cruisers

When did each naval power realize that protected and armoured cruisers were becoming obsolete?

Broadly between 1900 and 1910, although ships already ordered continued because cancelling them would create years of delay before replacements appeared.

The transition is placed broadly between 1900 and 1910, with no separate date assigned to each navy. Recognising a design's limitations could happen years before a replacement was ready to build. Contracts already paid for and ships already under construction kept older types in production. Cancelling them immediately risked leaving a gap with no new ships until the successor design entered construction. Completing a run could therefore preserve fleet numbers while the next design developed.