This is interesting. Cloud slicing is clearly still working for me, just very slow.
Today I performed an experiment and timed slicing with a relatively simple model. It took 60 seconds to upload, and 2:04 to slice. No status showed while slicing except the cancel button.
I then blocked ports 443 and 4443 from the printer and performed the same test with the same model. It took 60 seconds to upload and 5:10 to slice. This time it printed “Starting local slicing. Please wait…” and the slicer percent status showed up while slicing.
The 60 second periods seem to be repeated each time the Zim performs a network function on ports 443 and 4443. I would guess this it the TCP timeout they have set on those sockets, and the printer then reverts to a backup connection. If I were to remove 60 seconds from each operation, I’d say my Zim is just as fast as it ever was at uploading, slicing, connecting afterward, etc.
Seems clear to me the cloud slicing, such that it is, will be going away soon. It also seems clear they switched out some infrastructure. It is curious why it would be working for some and not at all for others though.