A couple dozen of Danish municipalities are working on replacing Google and Microsoft entirely in schools with a project called OS2Skole (skole meaning "school"). It's expected to save them around €3 million in yearly and the intention is to de-Googleify and de-Microsoftify children already from an early age and to make it open source.

https://www.os2.eu/os2skole

Mind you that the project was started before Trump got re-elected.

The majority of Internet infrastructure runs on either something Linux based or something FreeBSD based.

A lot of the tools used are also various flavours of open or semi open source.

I'd say open source already has success. Just not in places where you see consumers using it. Except... Wait a minute, Android is a fork of Linux, and Android is open source too.

Yes average people need to learn the open source stack instead of Microsoft.
It used to be most people could just learn some Microsoft thing, and they were almost guaranteed a job. Obviously a lot of people will be unhappy that isn't the case anymore, and they'll be annoyed they have to learn something new.

But this should have been done 20 years ago when Linux was obviously ready for it, and sensible people have advised it for just as long.
In the old CP/M days we had lots of good software developed locally, but when IBM became dominant, and chose to use MS-Dos, Microsoft was very cleverly deviously leveraging that to sabotage the competition, and take mostly every main stream market.

Trump is kind of a blessing in disguise, because he finally got people to wake up to reality.