Changing track end style settings in Pcbnew? Square end traces supported?

I was about to start a fresh topic
“Wide Trace Extends back from pad”
However, I found this old thread.
The issue in post #4 (“radius pokes out”) describes my query - it seems better to continue this thread.

Related to this issue I also saw the following
https://forum.kicad.info/t/smartpads-and-automatic-neckdown/9635 is the statement

We have a feature that’s internally called SmartPads. It tries to be smart about how a track exits a pad…

Is this feature implemented in Kicad 5 or is it still “internal”?

P.S. I have looked for “neckdown”, but have not yet found a menu setting etc relating to it. Changing track widths works reasonably but can be a bit fiddly.