Replying to
@EINS_Institute@infosec.exchange
@EINS_Institute@infosec.exchange @pluralistic@mamot.fr - yup. but for things like MS Office, the EU is actively supporting the creation of alternatives and banning the use of the incumbents for their own (official) use.
Convincing actual citizens to use the alternative rather than the "comfortable" de facto option is a bigger problem than building the alternative in the first place. As you say, incumbents like MS can leverage their huge market dominance, and stopping them is difficult.