I have a hot take - if we don't focus on FLOSS solutions for small (mom and pop/low tech savy) businesses, disenshittification is not possible. Think about it: the people who need to buy in to this are the ones who make business decisions. No one is serving them. Most people are either serving enterprise or home hobbyists.

Focusing on small business will create a repository (in the long run) or "recipe book" to help other small businesses.

As the businesses grow, they will uplift the open source understanding. Having a strong base of open source customers and a strong community support reduces the lever big tech has