The attention script will be my first, again. ADS has kind of implemented some of the functionality, but not completely.
In the past, it was it's own Z environment where you wrote it and compiled it. You could have written it outside however, and just brought it in at compile time. Would be useful if you have a preferred text editor.
with the Advent of Python, not sure how this is going to go. As the API calls are ostensibly going to be "includes" into the OS's Python environment. This being the case, it may very well be better to use a dedicated editor. There are Many. I have PyCharm, though have anxiously been awaiting to use it.
The actual overlap is hard to say. I would bet that the overall organization will be similar, but they may have re-written the specific API calls. Since they probably had to do so any way. As well, as much of the app is different than 6.x or 5.x when scripting was first available. The logic of walking through the geometry of an object, or group (these are different) is probably the same though.
Since, Z's behavior with the pick tool is quite a bit different than in the past, this is probably different in the SDK too. There seems to be far less pre-picking than in the past.
Callbacks, good chance a number of these are different (callbacks are essentially how the formZ app hooks into and uses your script)
For the most part though, if the tool is legacy from 6.x or 7.x then don't expect the API's for that tool to be there either. (Think C-Mesh tool)
If I understand correctly, the SDK got broken when they went to a fully 64Bit environment, as did the legacy file formats. By this time, they probably already had it in their head that they were making the move to python and did not see a valuable reason to put in the effort that was going to be abandoned soon enough any way. (speculation)
litte extra info:
Do understand, however, that not everything is really doable in scripting. In the old version, you could create a new object type with the full SDK, but not with the scripting environment.
Too, importers and exporters, and customer render modes were off limits to scripting. Shaders, on the other hand, were available.
Welcome to the endeavor! you will find it entertaining, frustrating, and ultimately rewarding!