If you think this is bad, then you should make sure to use copyleft licenses.
EDIT: Just read the details, and it seems that this is just what they did. SSPL is like AGPL with a stronger SAAS is distribution claus. That might not be valid, according to the OpenSource definition, but unless you are planning to modify the code and provide it as SAAS I think this is no a problem.
This is not as bad as they didn’t make the whole thing totally proprietary. But FOSS community definetly would have to seek for alternarives unfortunetly.
Or just keep using the FOSS versions. These license changes by definition can not be retroactive.