I thought I wanted a table saw that would accept a dado stack, but after months of searching I realized I would not find any. At the risk of overgeneralizing and being very mistaken, any machine that has the potential to be used in a commercial environment must meet the EU specifications for health and safety.
For saws, this includes the blade stopping within about ten seconds. The dado stack can add too much rotating mass to the arbor, and might not meet the braking limits. Additionally, the dado stack will not work with the blade guard installed. There are exceptions, and I think the Hammer (Felder) line of saws can be ordered with an arbor that will accept a dado stack, but the Hammer line is not intended for commercial operations. The SCM (Minimax) saws sold in the US can be ordered with longer arbors.
Ultimately, I realized I did not need a saw with a dado stack. My router table and hand-held router (with guide rail) have not failed to meet any dado or rabbet requirements for my projects.