More likely than not iX signaled that they planned to expand first-party community charts. All of these breaking changes coming from TC are from their own expansion of "enterprise" charts, including moving things out of free trains. I've had experience with that TC community, the snark in here is only the beginning of that unpleasantness.
In fairness this project is not meant to be taken seriously for production, it's on you, as is the standard pain of dealing with free software, to deal with when you have a situation of 20 TC containers. It's "community" for a reason, and SCALE itself comes with no guarantees and is rather new.
I suppose this is sort of the shrinking and pivoting to a new role as a true third-party that was inevitable for TC. It's almost always recommended to people when running containers on truenas, and a third party holding that position was not going to be comfortable for long.
Good riddance, hopefully by the end of this year there will not be a need for most people to even have that catalog.