Thanks Jim for that clarification. My most post was a direct response to the post I quoted which was a response to the question:
Maybe I should have quoted them both, but thanks anyway.
However, you might want to be careful. Your distinction between pins and tabs is becoming a bit blurred. When it comes to components in TO-220 packages I’m sure we can all agree as to what a “tab” is, and for the most part they can be ignored. They are seldom included on the schematic and don’t need a corresponding pad on the PCB. But the TO-263 (aka. DDPAK/D2PAK), the SMT cousin of the TO-220, is a 4 pin device. Pin 4 which you seem to refer to as a “tab”, requires a corresponding pad on the PCB for mechanical strength as well as thermal considerations and often pin 2 is omitted making pin 4 the only electrical connection to that terminal. The same is true for the SOT223 package.
I do agree however, many devices that use these packages can usually be represented on the schematic with 3 pin symbols.
Edit2: The above mentioned packages have multiple variants some of which have more than 4 terminations (pins), given the context of the current topic, the above refers to the 4 pin variants.