Forced open source for everyone but them. They retain copyright and will continue to sell proprietary adaptions, while forbidding everyone else to do the same.
I would find/fork a LibreMatrix and direct myself and all my clients to use that instead.
Openness and accountability is why I use matrix, and expect many others feel the same.
It is in the best interest of Element to stay open. After all, end to end encryption is impossible to trust if a central party controls both ends.