I agree. Big Tech can afford to wall their gardens and close off their ecosystems. That is because they have billions of users, and profits merely require keep

I agree. Big Tech can afford to wall their gardens and close off their ecosystems. That is because they have billions of users, and profits merely require keeping the users. But services undergoing adoption need to offer disruptive advantages such as extraordinary user experiences, or being interoperable with other networks to benefit from network effects. When a small movement (which is what Free Software is becoming sadly) chooses to burn bridges, they are bound to get even smaller.