HFM has made 4 different HEK's in what 8 years....
IF as we both think the Susvara will find its way to $3200 +/- $200
and the HEK SE will be $1700, that's a mighty large price gap where they don't have a planar to fight competitors.
There have been 4 versions of the 560, 4 of the HE-6, 4 or is it 5 Arya, 3 or 4 Ananda, 3 Sundara, 3 HEX/XS (4 if you count MD), at least 4 400's - more if you count the 4XX. All with lots of price drops over time. HE-6 SE $1800 -> $399 for instance. Of anything over $500 only the 500 and Susvara (2.5 and 3.5 plugs) come to mind as models that do not have multiple versions (560 is not related to the 500). HFM also has done silent mods as well.
Given how popular and profitable the HEK Series has been, why would they not continue with an update of some sort? It's got to be close to two years since the last HEK came out.
Fixation? No observation, memory, and the common sense of someone who has followed HFM very closely since 2016. The only variable based on HFM's past is when, not if.,