For an upgrade I'm trying to decide whether to change to 9-speed or 10-speed cassette, chain, derailleur, shifter and crank.
On the european Shimano website there are not many words about 9-speed components in the Deore XT Group and a european reseller has marked many items as "discontinued".
When choosing 9-speed today will I probably have trouble finding new components in about five years? Has Shimano officially discontinued 9-speed?