I just moved over from sdf.org to https://tilde.zone. Really thankful for all the up-to-date and useful services.
@benk out of date is correct for how I explained it. It's not quite that way but a bunch of services are broken, at least for me, and there has been no response to any of my help requests. It's probably better to say the volunteers there haven't had time to really keep up.
masto instance for the tildeverse