Open Source is often touted as an alternative to Big Tech, but a recent article suggests that it's not enough on its own. According to the author, Open Source requires significant investment in support, training, and services to be viable. The article cites a failed experiment with Nextcloud in the European Parliament as an example of this.
The article also notes that Apple offers many of the same features as Big Tech, but doesn't actively target the large enterprise/government market because it's not willing or able to provide the necessary support and services.
Source: https://berthub.eu/articles/posts/open-source-by-itself-is-no-alternative-for-big-tech/