That is the point of the article. If Germany would buy weapons from other countries it would be much cheaper for Germany. To be fair Leopard2 is the most common modern tank in the EU, so the logical choice to use as the standard, but Puma, Fennek, all ships of the German navy, Dingo, PzH 2000 and a bunch more are only really used by Germany and maybe some other countries as hand me downs or to bribe Germany. That means Germany pays for development cost, setting up the production line and so forth. Much cheaper and better to buy from European allies.
That is the point of the article. If Germany would buy weapons from other countries it would be much cheaper for Germany. To be fair Leopard2 is the most common modern tank in the EU, so the logical choice to use as the standard, but Puma, Fennek, all ships of the German navy, Dingo, PzH 2000 and a bunch more are only really used by Germany and maybe some other countries as hand me downs or to bribe Germany. That means Germany pays for development cost, setting up the production line and so forth. Much cheaper and better to buy from European allies.